Question

Cпростить вираз; (3x-1)(3x+1)+(3x+1)²

Answer 1

(3x-1)(3x+1)+(3x+1)^2=9x^2-1+9x^2+6x+1=18x^2-1+6x+1=18x^2+6x

Answer 2

$\(3x-1)(3x+1)+(3x+1)^2=\ (3x+1)(3x-1+3x+1)=\ (3x+1)cdot6x=\ 18x^2+6x$