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WAEC - Mathematics (2020 - No. 8)

If x = 3 and y = -1, evaluate 2(x\(^2\) - y\(^3\))
24
22
20
16

解释

2(\(x^2 - y^3\))

= 2(\(3^2 - (-1)^3\))

= 2(9 - (-1))

= 2 x 10 = 20

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