15. given the side measures, which of the following could form a triangle
a. 6,8,9
b. 1,2,3
c. 2,2,5
d.2,6,9

6,8,9

Step-by-step explanation:

6,8,9

any sum of two sides are bigger than the third side

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

sasaasasa

step-by-step explanation:

sasasdfubisdbjvkzc