angiecook26 angiecook26

08-10-2020
Mathematics

contestada

Evaluate 4xy+7y-9x+21-3x^2 when x=2 and y=-1 pour answer

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isabellacatherine99 isabellacatherine99

08-10-2020

Answer:

-24?

Step-by-step explanation:

4xy + 7y - 9x + 21 - 3x^2

4(2)(-1) + 7(-1) - 9(2) + 21 - 3(2)^2

-8 - 7 - 18 + 21 - 12

- 24

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