Question

How do you prove (3x+2)2 is equivalent to (3x+6)(3x-2)+16

i have tried expanding the brackets but I'm still really stuck
thankyou in advance

Answer 1

`(3x+2)^2=9x^2+12x+4\\\\ (3x+6)(3x-2)+16=\\ 9x^2-6x+18x-12+16=\\ 9x^2+12x+4`