How do you convert x(2) squared + 18x =-45? Thanks!!

2 Answers
May 11, 2018

(x+3)(x+15)

Explanation:

Add 45 to the LH side

x2+18x+45

(x+3)(x+15)

The reason I chose 15 because 153=45 and you need to get the middle part to be 18 so the two numbers that equal 45 must add up to 18

May 11, 2018

x=15 and x=3

Explanation:

x2+18x=45

Move all to one side:
x2+18x+45=0

Factor by looking for 2 Numbers to Multiply to 45 and Add to 18:
(x+15)(x+3)=0

Set each Factor =0 and solve for x:
x+15=0
x=15

x+3=0
x=3