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Simplifying y = 0.25((0.851(15 + -1.75x) + -2.5)(0.85(15 + -1.75x) + -2.5)) y = 0.25(((15 * 0.851 + -1.75x * 0.851) + -2.5)(0.85(15 + -1.75x) + -2.5)) y = 0.25(((12.765 + -1.48925x) + -2.5)(0.85(15 + -1.75x) + -2.5)) Reorder the terms: y = 0.25((12.765 + -2.5 + -1.48925x)(0.85(15 + -1.75x) + -2.5)) Combine like terms: 12.765 + -2.5 = 10.265 y = 0.25((10.265 + -1.48925x)(0.85(15 + -1.75x) + -2.5)) y = 0.25((10.265 + -1.48925x)((15 * 0.85 + -1.75x * 0.85) + -2.5)) y = 0.25((10.265 + -1.48925x)((12.75 + -1.4875x) + -2.5)) Reorder the terms: y = 0.25((10.265 + -1.48925x)(12.75 + -2.5 + -1.4875x)) Combine like terms: 12.75 + -2.5 = 10.25 y = 0.25((10.265 + -1.48925x)(10.25 + -1.4875x)) Multiply (10.265 + -1.48925x) * (10.25 + -1.4875x) y = 0.25((10.265(10.25 + -1.4875x) + -1.48925x * (10.25 + -1.4875x))) y = 0.25(((10.25 * 10.265 + -1.4875x * 10.265) + -1.48925x * (10.25 + -1.4875x))) y = 0.25(((105.21625 + -15.2691875x) + -1.48925x * (10.25 + -1.4875x))) y = 0.25((105.21625 + -15.2691875x + (10.25 * -1.48925x + -1.4875x * -1.48925x))) y = 0.25((105.21625 + -15.2691875x + (-15.2648125x + 2.215259375x2))) Combine like terms: -15.2691875x + -15.2648125x = -30.534x y = 0.25((105.21625 + -30.534x + 2.215259375x2)) y = (105.21625 * 0.25 + -30.534x * 0.25 + 2.215259375x2 * 0.25) y = (26.3040625 + -7.6335x + 0.5538148438x2) Solving y = 26.3040625 + -7.6335x + 0.5538148438x2 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Simplifying y = 26.3040625 + -7.6335x + 0.5538148438x2
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