Question

19-(3х²-2х)-(6x-Х²)=7-2Х²)до іть, терміново треба❤

Answer 1

$\boxed{x = 3}$

Объяснение:

$19 - (3x^{2} - 2x) - (6x - x^{2} ) = 7 - 2x^{2}$

$19 - 7 + 2x^{2} = (3x^{2} - 2x) + (6x - x^{2} )$

$12 + 2x^{2} = 3x^{2} - 2x + 6x - x^{2}$

$12 + 2x^{2} = 2x^{2} + 4x|:2$

$6 + x^{2} = x^{2} + 2x$

$2x = 6|:2$

$x = 3$