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Simplifying y = (x + 5)(x + -7) Reorder the terms: y = (5 + x)(x + -7) Reorder the terms: y = (5 + x)(-7 + x) Multiply (5 + x) * (-7 + x) y = (5(-7 + x) + x(-7 + x)) y = ((-7 * 5 + x * 5) + x(-7 + x)) y = ((-35 + 5x) + x(-7 + x)) y = (-35 + 5x + (-7 * x + x * x)) y = (-35 + 5x + (-7x + x2)) Combine like terms: 5x + -7x = -2x y = (-35 + -2x + x2) Solving y = -35 + -2x + x2 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Simplifying y = -35 + -2x + x2
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