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Determine the value a such that …

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Determine the value a such that (x-2) is a factor of f(x)=x3+ax2-5x-6. Full sol

Posted by Paritosh Purbia 6 years, 9 months ago

CBSE > Class 09 > Mathematics

2 answers

Riya Doshi 6 years, 9 months ago

x-2=0 x=2 p(x)=x^3+ax^2-5x-6 p(2)= (2)^3+a(2)^2-5(2)-6 =8+4a-10-6 =4a-10-6+8=0 =4a-16+8=0 =4a-8=0 =4a=8 a=8÷4 =a=2

Akshay Am 6 years, 9 months ago

x=-2 P(-2)=(-2)3+a(-2)2 -5(-2)-6 =-8+4a+10-6 =-14+10+4a =-4+4a =-4+4a=0 =4a=4 =a=4/4 =a=1

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