Which table shows a function that is decreasing only over the interval (-1, oo)? -3
-2
-1
0
1 -
2
1x)
-1
-3
-5
-2
-1
2
х
-3
-2
-1
0
f(x)
-3
-5
-7
-6
1
-1
х
-3
-2
-1
0
1
2
f(x)
-4
-3
-1
2
1
-6
х
-3
-2
-1
0
1
2
f(x)
-5
-1
1
0
-4
-8
1
2
0

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