7 x (9-5) = (7x?) - (7x?)

Well 9 - 5 = 4

to figure out (7 x ?) - 7-?

First you have to figure out what ? is

Well if 9 - 5 = 4, then the ? is 4!!

So 7 x 4 =28 and 28 - 28 = 0

so your anwswer is:

(7 x 4) = (28 - 28) and the ?=4

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

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