Question

Can someone help me solve for x & explain how they got it please?? i have a test tomorrow!!

Answer 1

Answer:

36=x^2+5x

x^2+5x-36=0

(x+9)(x-4)

x= 4

x= -9

The Answer can be 4 or -9, see which option you have.

Step-by-step explanation:

Answer 2

Answer:

x=4

Step-by-step explanation:

Usually what I do is sort of a guess and check, and this should be easy if your square roots memorized

First you know that x^2+5x is equaled to 36 because both sides of the triangle has a tick

I look at x squared first. You know the value for X has to be less than six because 6 squared is already 36.

Then I start plugging in values under 6 like 5, 4, 3 ex

When you plug in 5 you get 50, so we know we have to choose a lower value

When plugging in 4 you get 36

4 squared is 16, 5 x 4 = 20, 20+16 = 36