To factor you have to do this:

s^2 + 9s = -20
+ 20 +20

s^2 + 9s + 20 = 0

now you need to numbers that multiplied give you 20
and then those same 2 numbers have to add to 9

5 x 4 = 20
5+ 4 = 9

(x + 4) (x+ 5)

that means that x= -4, and -5

8 0

3 years ago

4x+5=6x-7<br> How do I solve this?

vodka [1.7K]

Answer:

x=6

Step-by-step explanation:

4x+5=6x-7

4x-6x=-7-5

-2x=-12

x=-12/-2

x=6

3 0

4 years ago

Read 2 more answers

Solve system of equations

sergey [27]

The answer to your question is (1,9) :)

8 0

3 years ago

Read 2 more answers

Answers for both boxes for 25 points

Sav [38]

Step-by-step explanation:

gave you in Photo..... please do mark as brainlist

8 0

3 years ago