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14-08-2022
Mathematics

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2y-4(2x² + 5x) + 3x² + 8y³ + 4x when x = -1 and y = 2

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jimrgrant1 jimrgrant1

14-08-2022

Answer:

79

Step-by-step explanation:

substitute the given values into the expression

2(2) - 4(2(- 1)² + 5(- 1) ) + 3(- 1)² + 8(2)³ + 4(- 1)

= 4 - 4(2(1) - 5) + 3(1) + 8(8) - 4

= 4 - 4(2 - 5) + 3 + 64 - 4

= 4 - 4(- 3) + 63

= 4 + 12 + 63

= 79

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