Answer:
It's x = -4 , 2.
Step-by-step explanation:
x^2 + 2x - 8 = 0
The left side will factor to the form (x + a)(x + b).
We need 2 numbers (a and b) whose product = -8 and whose sum = +2.
These are a = 4 and b = -2, so the factors are
(x + 4)(x - 2) = 0
Now either x + 4 = 0 or x - 2 = 0,
giving x = -4, x = 2 (answer).
Answer:
-2 , 4
Step-by-step explanation:
Their are 4 ways you can solve this but I am going to factorise to solve
x² + 2x − 8 = 0
Factors = 4 , -2
Sum = 2
Product = -8
x ( x + 4 ) - 2 ( x + 4 ) = 0
( x - 2 ) ( x + 4 ) = 0
x = - 2 , 4
