Question

I know the answer it is 13.5

Answer 1

If the answer is 13.5 then the answer is 13.5

Step-by-step explanation:

Well, first we have to start off with 13.5 = x in order to find it later on.

Then we can do operations to both sides

13.5 = x

27 = 2x

27²=4x²

729 = 4x²

then if we subtract 4x² from both sides we can use the quadratic formula to derive x

-4x² + 729 = 0

Where a = -4, b = 0 and c = 729

plug it in to the quadratic formula

x = (-b±
`\sqrt{b^(2) -4ac}`) / 2a

x = (-0±
`\sqrt{(0)^(2) -4(-4)(729)}`) / 2(-4)

x = (-108)/-8 = 13.5

There we go! there's our answer