Solve by using the quadratic equation: 2x²-4x=9
My answer got down to 4±4√22/4 and I simplified it to1±√22.

x = { 1 + 2√22, 1 - 2√22}

Step-by-step explanation:

The quadratic equation:

x = (-b ± )/2a

x = (4 ± √(16-4(2)(-9))/2(2)

(Also, I'm assuming =9 meant -9, but either way, it wouldn't make a difference)

x = (4 ± √(16+72))/4

x = (4 ± √88)/4

x = 1 ± 2√22

x = { 1 + 2√22, 1 - 2√22}

I got the same answers as you! If you're looking for a more specific answer, plug it into a calculator for decimals.

It looks like you didn't need any help!

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.