Question

when f(x)=x^3-6x-a is divided by x+2

Answer 1

Hey mate!!

✴ FACTOR THEOREM ✴
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Question :- find the value of a.

Solution:

g(x) = x + 2 = 0, x = -2

f(x) = x³ - 6x - a

$x {}^{3} - 6x - a = 0 \\ \\ ( - 2) {}^{3} - 6( - 2) - a = 0 \\ \\ - 8 + 12 - a = 0 \\ \\ - 8 + 12 = a \\ \\ \therefore{a} = 4$

Thanks for the question!

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Answer 2

Hope this will help you