a) 7x^2-x-8=0
7x^2 - x = 8
x(7x-1) = 8
x=8 або 7x-1=8; 7x=9 x= 7/9
б) 2x^2 -6x = 0
2x(x-3)= 0
2x=0 або x-3 =0
x = 0 x=3
a) 7x^2-x-8=0
7x^2 - x = 8
x(7x-1) = 8
x=8 або 7x-1=8; 7x=9 x= 7/9
б) 2x^2 -6x = 0
2x(x-3)= 0
2x=0 або x-3 =0
x = 0 x=3