Question 386776
(x- 7 )(5x + 2) = 0
..
for the equation to be =0
either (x-7) =0
OR 5x+2=0
if x-7 = 0
x=7
..
If 5x+2=0
-2  -2
5x=-2
/5
x=-2/5
x=7 OR -2/5

X^2 + 3x – 28 = 0
x^2+7x-4x-28
x(x+7)-4(x+7)=0
(x+7)(x-4)=0
x=-7 OR x=4
...
m.ananth@hotmail.ca