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Then apply Addition Property of Equality, meaning add -3x to both sides of the equation.It will be:. Then the standard form of the equation (x+7)(x+7)=-3x is .

(×+7)(×+7)=-3×

x2 + 7x + 7x + 49 + 3x = 0

x2 + 14x + 3x + 49 = 0

x2 + 17x + 49 = 0

a = 1; b = 17; c = 49

Solve using Quadratic Formula:

ANSWER:

x = and

PLEASE CLICK IMAGE BELOW TO VIEW SOLUTION USING QUADRATIC FORMULA.