Which polynomial is a perfect square trinomial?

A) 9x^2-12x+4

Step-by-step explanation:

to find out whether an equation is a perfect square when we take the square root of "a" and the square root of "c" and double their sum. The result should be the middle term, -12

so

square root of 9; 3

square root of 4: 2

2((3*-2))=-12

now we can take the square root of 9x^2(which is 3x) and the square root of 4(-2) and put it in a expression like this

(3x-2)^2

hope this helps!

(23*2)-12=x     x=34

step-by-step explanation:

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!