Problems with this equation

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gamegrid2010

June 23, 2020 20:47

I dont seem to understand that these equations equal these solutions. From how khan shows this equations. -2 to the second power for example, should equal -4. The only way I know that would make that solution a positive would be that parenthesis would be in between the number and exponent.

Please answer at the earliest convenience.. Thank you

Logan Davison

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Miss Beatlemaniac

June 24, 2020 17:16
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Hmm. I think there are supposed to be parentheses for both of those because substitution is involved. And you're right - without them, it would change the value of the expressions (to 6 and 9 respectively). It seems that this is an error that no one has caught yet; that's strange. (I haven't studied Algebra 2, but I'm quite sure that any substitution requires parentheses for accuracy.)
gamegrid2010

June 24, 2020 18:54
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I'll try and see if always using parenthesis is the way to go.. Thank you! :D

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