How do you solve quadratic equation: #x^2+2x-8# by factoring?
There is a contradiction in the question.
It is an expression, not an equation, so it cannot be solved.
However, let's assume it was supposed to read as
Find the factors.
Reading from the back we have the following information.
"Find the factors of 8 which subtract (-) to make 2".
"The signs will be different (because of -)"
"There must be more positives. (because of +2)"
Factors of 8 are either 8 x 1 or 4 x 2 .
4-2 = 2 , so these are the factors we want.
Write the factors in the brackets:
Fill in the signs:
Now because the answer is 0, each bracket could be 0.
These are the solutions to the equation.