Question

(х-3)²+(3-х)(х+3)=(х+2)²-х²
Помогите 7 класс.

Answer 1

$x {}^{2} - 6x + 9 + 9 - x {}^{2} = x {}^{2} + 4x + 4 - x {}^{2} \\ - 6x + 18 = 4x + 4 \\ - 10x = -14 \\ x = \frac{14}{10} \\ x = \frac{7}{5}$