1)x1=-5 x2=2/3
3x^2+15x-2x-10=0
3x(x+5)-2(x+5)=0
(x+5)(3x-2)=0
x+5=0
3x-2=0
x=-5
x=2/3
2)x1=0 x2=3/2
x(2x-3)=0
x=0
2x-3=0
x=3/2
3)x1=-2/5 x2=2/5
25x^2-4=0
25x^2=4
x=+-2/5
x=-2/5
x=2/5
4)x1=7 x2=9
x^2-7x-9x+63=0
x(x-7)-9(x-7)=0
(x-7)(x-9)=0
x-7=0
x-9=0
x=7
x=9
1)x1=-5 x2=2/3
3x^2+15x-2x-10=0
3x(x+5)-2(x+5)=0
(x+5)(3x-2)=0
x+5=0
3x-2=0
x=-5
x=2/3
2)x1=0 x2=3/2
x(2x-3)=0
x=0
2x-3=0
x=0
x=3/2
3)x1=-2/5 x2=2/5
25x^2-4=0
25x^2=4
x=+-2/5
x=-2/5
x=2/5
4)x1=7 x2=9
x^2-7x-9x+63=0
x(x-7)-9(x-7)=0
(x-7)(x-9)=0
x-7=0
x-9=0
x=7
x=9