Select all of the expressions that are equivalent to 6+4 (36 - 8) - 4b. - 18b
2(4b- 13)
12b - 4b - 26
10 (3b - 8) - 4b
6 - 8+ 12b-4b

other answer is correct. i had used the radius of the radius somehow. a website:

$649.60

step-by-step explanation:

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