Question

y = (x + 2)(x + 1)(x – 3)2

Answer 1

y = (x+2)(x+1)(x-3)

y = (x^2+x-2)(x+3)

y = (x^3+4x^2+x-6)------------- ( 2 )

from (2) substitute and u will get answer

Answer 2

y=(x+2)(x+1)(x-3)2
y=(x^2+3x+2)(x-3)2
y=(x^2+3x^2+2x-3x^-9x-6)2
y=(x^2-7x-6)2
y=2x^2-14x-12