Question

Решите выражение 2x(x+3)+(x-3)^2

Answer 1

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

6x и -6x СОКРАЩАЕМ 

Answer 2

$2x(x + 3) + {(x - 3)}^{2}$
$2 {x }^{2} +6x + {x}^{2} - 6x + 9$
$3 {x}^{3} + 9$