x^2-7x-30
Find two numbers a,b
a • b = -30
a+ b= -7
divide by a
b= -30/a
If Then a = -10
b = -30/-10= 3
Now factorize
x^2-7x-30 = (x -10)• (x + 3)
Answer is
(x - 10)•(x + 3)
