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Simplifying f(9) = 2.15(2x2 + -4x + -6) Reorder the terms for easier multiplication: 9f = 2.15(2x2 + -4x + -6) Reorder the terms: 9f = 2.15(-6 + -4x + 2x2) 9f = (-6 * 2.15 + -4x * 2.15 + 2x2 * 2.15) 9f = (-12.9 + -8.6x + 4.3x2) Solving 9f = -12.9 + -8.6x + 4.3x2 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by '9'. f = -1.433333333 + -0.9555555556x + 0.4777777778x2 Simplifying f = -1.433333333 + -0.9555555556x + 0.4777777778x2
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