Choose all the equations that have m =5 as the solution A. m - 1 = 4

B. m + 4 = 20

C. m - 3 = 8

D. 22 + m = 25

E. 12 = m + 7

A and E

Step-by-step explanation:

Plug 5 in for m in every equation, and see if the math works.

A.

A - works

B.

B - does not work

C.

C - does not work

D.

D - does not work

E.

E - works

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct