Question

Решите

(10x + 14) x - (5x - 1)(2x + 3) = 4

Answer 1

$(10x+14)x-(5x-1)(2x+3)=4$
$10x*x+14*x-5x*2x-5x*3+1*2x+1*3-4=0$
$10x^2+14x-10x^2-15x+2x+3-4=0$
$x-1=0$
$x=1$

Answer 2

(10x+14)x-(5x-1)(2x+3)=4
10x^2+14x-(10x^2+15x-2x-3)=4
10x^2+14x-10x^2-15x+2x+3-4=0
x-1=0
x=1