Question

Найдите корни уравнений: (2х-1)(х+5)-(х+1)(х+2)=0 (3х+1)(3х-1)=8х-2 (2х+1)2=(1+3х)(3х-1) (3-m)2=4m(m-3)-15

Answer 1

(2х-1)(х+5)-(х+1)(х+2)=0

2x^2+10x-x-5-(x^2+2x+x+2)=0

2x^2+9x-5-x^2-3x-2=0

x^2+6x-7=0

Корни: -7 и 1.