Question

Simplify the below algebraic expression and obtain its value for y = −1

4y(2y − 6) – 3(y − 2) + 20​

Answer 1

$4y(2y - 6) - 3(y - 2) + 20 \\ \\ so \: that \: y \: is \: given \: as - 1 \: \\ \\ \\ 4 \times - 1(2 \times -1) - 3( - 1 - 2) +20 \\ \\ - 4( - 2) - 3( - 3) + 20 \\ - 6 - 6 + 20 \\ - 12 + 20 \\ 8$

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