SOLUTION: Use the quadratic formula to solve the equation. 2x^2-x=-7 The solution set is { }

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Question 391717: Use the quadratic formula to solve the equation.
2x^2-x=-7
The solution set is { }
Found 2 solutions by MathLover1, ewatrrr:
Answer by MathLover1(20849) (Show Source):
You can put this solution on YOUR website!

.......in standard form it will be:

Solved by pluggable solver: Quadratic Formula

Let's use the quadratic formula to solve for x:

Starting with the general quadratic

the general solution using the quadratic equation is:

So lets solve ( notice , , and )

Plug in a=2, b=-1, and c=7

Negate -1 to get 1

Square -1 to get 1 (note: remember when you square -1, you must square the negative as well. This is because .)

Multiply to get

Combine like terms in the radicand (everything under the square root)

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

Multiply 2 and 2 to get 4

After simplifying, the quadratic has roots of

or

Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website!

Hi,
Using the quadratic formula to solve
2x^2-x=-7
2x^2-x + 7 =0