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Check whether (2x+1) is a factor of P(x) = 2x^3-x^2+x-5. please help me :DDD |
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Answer» Answer Correct OPTION is A 0 p(x)=2x 3 +x 2 −2x−1,g(x)=x+1 g(x)=0⇒x+1=0⇒x=−1 ∴ Zero of g(x) is −1 Now, p(−1)=2(−1) 3 +(−1) 2 −2(−1)−1 =−2+1+2−1=0 ∴ By factor THEOREM, g(x) is a factor of p(x). |
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