Question

Write the coefficient of x sqaure in the expansion of (x-2) cube.​

Answer 1

Answer:

-6

Step-by-step explanation:

( x-2)^3=x^3-8-3×x×2(x-2)=x^3-8-6x^2+12x

coefficient of x^2 is -6.

Answer 2

Answer:

Let

(x-2)³ =(x-2)(x-2)(x-2)

=(x²±4-4x)(x-2)

= x³+4x-4x²-2x³-8-8x²

=-x³+4x-12x²-8

Hence, we observe that the coefficient of x sqaure is( - 14)

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