Question

what must be subtracted from -5a²b to get -8a²b

Answer 1

Hey !!


Let X should be subtracted form -5a²b to get -8a²b.


Therefore,



-5a²b - X = -8a²b



-X = -8a²b + 5a²b



-X = -3a²b



X = 3a²b


Hence,

3a²b should be subtracted from -5a²b to get -8a²b.

Answer 2

$\textbf{Your answer !! }$

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$Let \:the\: number \:be \:x \\ \\ Now, \\ \\ - 5{a}^{2}b - x = - 8{a}^{2}b \\ \\ - x = - 8{a}^{2}b + 5{a}^{2}b \\ \\ - x = - 3{a}^{2}b\\ \\ x = + 3{a}^{2}b$

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