Question

9х(х-2)+(2-3х)(2+3х)=22

Answer 1

Ответ:

-1

Объяснение:

9х(х-2)+(2-3х)(2+3х)=22

$9x (x - 2) + (2 - 3x)(2 + 3x) = 22 \\ 9x {}^{2} - 18x + (4 + 6x - 6x - 9x {}^{2} ) = 22 \\ 9x {}^{2} -18x + 4 - 9x {}^{2} = 22 \\ - 18x + 4 = 22 \\ - 18x = 22 - 4 \\ - 18x = 18 \\ x = - 1$