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





 

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