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
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