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Solving equations Solve for y if: -11y = 55, y = Algebraic substitution III Calculate -2x + 8y if x = 3 and y = -1 Expanding brackets II -9n(-2n – 11) = n2 + 99n Expanding quadratics (b - 6)(b + 12) = b2 + b – 72 Factoring quadratics a2 + 12a + 36 = (a + )2 Surface area of cubes A cube with a surface area of 216 cm2 has sides of length cm
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