اختبار اختيار من متعدد تفاعلي: The Remainder and Factor Theorem - Reveal
The Remainder Theorem and the Factor Theorem are fundamental concepts in algebra for analyzing polynomials. The Remainder Theorem states that when a polynomial \(f(x)\) is divided by \(x - c\), the remainder is equal to \(f(c)\). Building upon this, the Factor Theorem establishes a crucial link: \(x - c\) is a factor of the polynomial \(f(x)\) if and only if \(f(c) = 0\). These theorems allow for efficient factorization of higher-degree polynomials and identification of their roots without performing complex long division.
🏆 انضم إلى التحدي واحصل على ترتيبك
اختبار شهادة تدريبي مؤقت للصف والمادة والفصل نفسه.
اختر إجابة واحدة لكل سؤال. عند الاختيار ستظهر النتيجة فورًا: الأخضر صحيح، والأحمر خطأ، وسيظهر تفسير الإجابة مباشرة إن كان متوفرًا. وبعد آخر سؤال ستظهر الدرجة النهائية تلقائيًا.
Which binomial is a factor of f(x) = x3 - 6x2 + 3x + 10?
Explanation
By the Factor Theorem, x + 1 is a factor if f(-1) = 0. Calculating f(-1) = (-1)3 - 6(-1)2 + 3(-1) + 10 = -1 - 6 - 3 + 10 = 0. Therefore, x + 1 is a factor.
Question 2
Points: 1
What is the remainder when a3 - 4 is divided by a + 2?
Explanation
According to the Remainder Theorem, the remainder when a polynomial P(a) is divided by a + 2 is P(-2). Substituting a = -2 into a3 - 4 gives (-2)3 - 4 = -8 - 4 = -12.
Question 3
Points: 1
Which binomial is a factor of f(x) = x3 + x2 - 24x + 36?
Explanation
Using the Factor Theorem, testing x = -6: f(-6) = (-6)3 + (-6)2 - 24(-6) + 36 = -216 + 36 + 144 + 36 = 0. Since f(-6) = 0, x + 6 is a factor.
Question 4
Points: 1
What is the remainder R when the polynomial p(x) is divided by x - 5? p(x) = x3 - 5x2 + 2x - 10
Explanation
By the Remainder Theorem, the remainder is p(5). p(5) = 53 - 5(5)2 + 2(5) - 10 = 125 - 125 + 10 - 10 = 0.
Question 5
Points: 1
We know f(-1) = 0 for the polynomial f(x) = x3 - 6x2 + 5x + 12. What do we know is a factor of f(x)?
Explanation
According to the Factor Theorem, if f(c) = 0, then (x - c) is a factor. Given f(-1) = 0, the factor is x - (-1) = x + 1.
Question 6
Points: 1
We know f(4) = 0 for f(x) = x3 - 6x2 + 5x + 12. Factor f(x) completely using this information.
Explanation
Given f(4) = 0, x - 4 is a factor. Dividing the polynomial by x - 4 gives x2 - 2x - 3, which factors into (x + 1)(x - 3). Thus the complete factorization is (x - 4)(x + 1)(x - 3).
Question 7
Points: 1
If f(x) = 3x2 - 9x - 20, find the value of f(5).
Explanation
Substitute x = 5 into the function: f(5) = 3(5)2 - 9(5) - 20 = 3(25) - 45 - 20 = 75 - 45 - 20 = 10.
Question 8
Points: 1
Find all the zeros, given that f(-3) = 0. f(x) = 2x3 + 5x2 - 6x - 9
Explanation
Since -3 is a zero, divide 2x3 + 5x2 - 6x - 9 by x + 3 to get 2x2 - x - 3. Factoring 2x2 - x - 3 gives (2x - 3)(x + 1), which yields zeros at 3/2 and -1. The full set of zeros is -3, -1, 3/2.
Question 9
Points: 1
Find all the factors of x3 - 3x2 - 4x + 12 given that -2 is a zero.
Explanation
Since -2 is a zero, x + 2 is a factor. Dividing x3 - 3x2 - 4x + 12 by x + 2 results in x2 - 5x + 6, which factors further into (x - 2)(x - 3). The complete set of factors is (x + 2)(x - 2)(x - 3).
Question 10
Points: 1
Find all the real zeros of the function f(x) = 2x3 - 19x2 + 38x + 24 given that x - 4 is a factor.
Explanation
Given x - 4 is a factor, 4 is a zero. Using synthetic or long division to divide the polynomial by x - 4 yields 2x2 - 11x - 6. Factoring this quadratic gives (2x + 1)(x - 6), providing zeros at -1/2 and 6. The real zeros are 4, -1/2, 6.
Result Tracking
Answered0 / 10
Correct Answers0
Wrong Answers0
Current Percentage0%
Quiz Completed
This is your final result after answering all questions.
Final Result
0/100%
Correct Answers0
Wrong Answers0
Answered Questions0 / 10
Total Possible Points10
You can reopen the page to start again.
يمكنك تسجيل الدخول لحفظ سجل محاولاتك، معرفة أخطائك المتكررة، والحصول على نصائح مخصصة. تسجيل الدخول باستخدام Google
Here are more quizzes for الصف العاشر المتقدم by الفصل الثالث and subject رياضيات
This section is rendered only when the user reaches it while scrolling.
...
🍪
إشعار ملفات تعريف الارتباط
يستخدم هذا الموقع ملفات تعريف الارتباط لتحسين تجربة التصفح وقياس الأداء وعرض المحتوى بشكل أفضل.
باستخدامك للموقع فإنك توافق على استخدامنا لها وفق
سياسة الخصوصية.