Which shows the equation below written in the form ax2 + bx + c = 0? x + 9 = 4(x-1)^2
LOOK AT THE PICTURE REALLY EASY

D

Step-by-step explanation:

We have the equation:

To convert this to standard form, we can simply expand.

First, expand the right-hand side:

Distribute the right:

Subtract 9 from both sides:

Finally, subtract an x from both sides:

Flip:

Hence, our answer is D.

1. perpendicular

2. parallel

3. perpendicular

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.