How do you factor the expressions x2+7x−18?
3 Answers
May 12, 2018
Explanation:
Given:
Split the middle term.
Factor by each side.
May 12, 2018
Explanation:
since the coefficient of the x2 term is 1 then
the factors of - 18 which sum to + 7 are + 9 and - 2
⇒x2+7x−18=(x+9)(x−2)
May 12, 2018
Explanation:
With this type of quadratic, we need to find a number that adds to make
We can start by listing the factors of
Place in double brackets:
We can check by expanding: