Question

Edwin was evaluating the expression below when a = 3 and b = -6

Answer 1

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`\blue\textsf{\textbf{\underline{\underline{Question:-}}}}`

Evaluate the expression a²-18+4b when a=3 and b=-6

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Substitute 3 in lieu of a and -6 in lieu of b:-

(3)²-18+4(-6)

9-18+4(-6)

On further simplification,

9-18-24

`\dashrightarrow\bigstar\boxed{\boxed{\underline{\bold{-33}}}}\dashleftarrow`

Good luck.

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Answer 2

D

Explanation:

`{3}^(2) - 18 + 4( - 6) \\ 9 - 18 + ( - 24) \\ - 9 + ( - 24) \\ = - 33`