Solve x²  4x + 12 = 0 for x.
x²  4x + 12 = 0
1(x² + 4x  12) = 0 {factored 1 out} x² + 4x  12 = 0 {divided each side by 1} (x + 6)(x  2) = 0 {factored into two binomials} x + 6 = 0 or x  2 = 0 {set each factor equal to zero} x = 6 or x = 2 {solved each equation} Ask the House
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