SOLUTION: Please, help me how to solved the quadratic equation: x²+10x=-21

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Question 908475: Please, help me how to solved the quadratic equation: x²+10x=-21
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
bring to one side
x²+10x+21
You want factors of 21 which add up to 10