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Mathematics, 19.09.2019 10:00 fatherbamboo

The first step for deriving the quadratic formula from the quadratic equation, 0 = ax^2 + bx + c, is shown.
step 1: –c = ax^2 + bx
which best explains or justifies step 1?
1)subtraction property of equality
2)completing the square
3)factoring out the constant
3)zero property of multiplication

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