Question

The value of 2 [3 (x^2 - 5) + 5y] when x = 9 and y = 3. A. 729.

Answer 1

`= 2(3( {(9})^(2) - 5) + 5(3)) \\ = 2(3(81 - 5) + 15) \\ = 2( 3(76) + 15) \\ = 2(228 + 15) \\ = 2(243) \\ = 486`

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