Question

(8xв2-8x+5)-(6xв2-2)=

Answer 1

(8x^2-8x+5)-(6x^2-2)=8x^2-8x+5-6x^2+2=
=2x^2-8x+7
D=64-4*2*7=64-56=4
x=(8+2)/4=10/4=2.5
x=(8-2)/4=6/4=1.5
Ответ: x=2.5; x=1.5