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Use the Remainder Theorem to Find Which of the Following is a Factor of 2x3 + 3x2 – 5x – 6. X + 1 - Mathematics

Sum

Use the Remainder Theorem to find which of the following is a factor of 2x3 + 3x2 – 5x – 6. 

x + 1

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Solution

By remainder theorem we know that when a polynomial f (x) is divided by x – a, then the remainder is f(a) 

let `f(x)=2x^3+3x^2-5x-6` 

`f(-1)=2(-1)^3+3(-1)^2-5(-1)-6=-2+3+5=0` 

Thus, (x + 1) is a factor of the polynomial f(x). 

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Selina Concise Maths Class 10 ICSE
Chapter 8 Remainder and Factor Theorems
Exercise 8 (A) | Q 3.1 | Page 108
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