Question

10x²-17x+34=7x²-26x+28

Answer 1

10x²-17x+34=7x²-26x+28
3x²=17x-26x-34+28
3x²=-9x-6
x²=-3x-2

Answer 2

3x^2+9x+6=0
D=81-72=9
x=(-9-3)/6=-2
x=(-9+3)/6=-1