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Quadratic Equations - Exercise 1
Fill in the missing justifications for the steps below where the
equation x2 + 3(x + 5) = 25 is solved with solutions
x = 2 and x = -5. Remember the Zero Product Law: If AB = 0, A=0 or
B=0.
STATEMENT
JUSTIFICATION
x2 + 3(x + 5) = 25
x2 + 3x + 15 = 25
x2 + 3x -10 = 0
(x + 5)(x - 2) = 0
x + 5 = 0 or x - 2 = 0
x = -5 or x = 2
Given
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Distributive Property (Justifies
Factoring)
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