Question

please answer this question I need the explanation too​

Answer 1

Answer:

77x^2+17x-4.

Step-by-step explanation:

= 9x(3x+1)^2-4(x-1)^2

=9x[(3x)^2+2(3x)(1)+(1)^2]- 4[(x)^2-2(x)(1)+(1)^2]

=9x(3x^2+6x+1)-4(x^2-2x+1)

=27x^2+54x^2+9x-4x^2+8x-4

=81x^2-4x^2+17x-4

=77x^2+17x-4

Hope it will help you.