Question

In the expansion of $(5x-3)(x+2{)}^2$ ; find the coefficient of $x$.

• A. 5
• B. -12
• C. 8
• D. 20

Answer 1

The correct option is C 8

$(5x-3)(x+2{)}^2=(5x-3\left)\right(x^2+4x+4)$

$5x^3+20x^2+20x-3x^2-12x-12$

$5x^3+17x^2+8x-12$

$\therefore$ Coefficient of $x=8$