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If x = 7, y = -6 and z = -2, find the value of i. (x + y) + z ii. x + (y + z) iii. xyz iv. (x + y)z v. xy + xz |
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Answer» i. (x + y) + z = (7 + -6) + -2 = 1 – 2 = -1 ii. x + (y + z) = 7 + (-6 + -2) = 7 – 8 = -1 iii. xyz = 7 × -6 × -2 = 84 iv. (x + y)z = (7 + -6) × -2 = 1 × -2 = -2 v. xy + xz = (7 × -6) + (7 × -2) = -42 – 14 = -56 |
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