Question

(x+2)power3 =2x(x power2-1)is​

Answer 1

(x+2)³ = 2x(x²-1)

x³+8+3×x×2(x+2) = 2x³-2x

x³+8+6x(x+2) = 2x³-2x

x³+8+6x²+12x = 2x³-2x

x³-2x³+6x²+12x-2x+8 = 0

-x³+6x²+10x+8 = 0

x³-6x²-10x-8 = 0 Answer