SOLUTION: -x Squared + 2x = 8

Question 145102: -x Squared + 2x = 8
Found 2 solutions by shahid, jim_thompson5910:
Answer by shahid(44) (Show Source): You can put this solution on YOUR website!
=8
=8 taking minus sign common
=-8 dividing by -1 both sides
=0
=0 breaking middle term
=0
x=4 or x=-2
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Get all terms to the left side.

Notice we have a quadratic equation in the form of where , , and

Let's use the quadratic formula to solve for x

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Subtract from to get

Multiply and to get .

Simplify the square root (note: If you need help with simplifying square roots, check out this solver)

Break up the fraction.

Reduce.

or Break up the expression.

So our answers are or

which approximate to or

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