Algebra

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Mathfailer Mathfailer
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Algebra

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AlgebraHouse AlgebraHouse
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Re: Algebra

-6 = 4x - 2x²
2x² - 4x - 6 = 0   {added 2x² and subtracted 4x from each side@}
2(x² - 2x - 3) = 0   {factored 2 out}
x² - 2x - 3 = 0   {divided each side by 2}
(x - 3)(x + 1) = 0   {factored into two binomials}
x - 3 = 0   or   x + 1 = 0   {set each factor equal to zero}
x = 3   or   x = -1   {solved each equation for x}

- Algebra House