Question

помогите решить (3х-5)(4х+1)+(2х+3)(5х-4)=6х(3+2х)-11

Answer 1

12x²+3x-20x-5+10x²+15x-8x-12=18x+12x²-11

10x²-28x-6=0

5x²-14x-3=0

D= 196+60= 256

x1= (14+16)/10= 3

x2= (14-16)/10= -0,2