iamciol iamciol

27-03-2019
Mathematics

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Evaluate 5x2−9 when x=−2

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makenziebaird makenziebaird

27-03-2019

answer: 11

explanation: just plug in -2 for x. the new problem becomes 5(-2)^2 - 9. Negative two squared is 4. 5 times 4 is 20. 20 minus 9 is 11.

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