Question

Simplify :-
$3y\left(2y-7\right)-3\left(y-4\right)-63$ for $y=\left(-2\right)$

Answer 1

Solve $3y(2y-7)-3(y-4)-63$ for $y=-2$

First simplify it,

$=6y^2-21y-3y+12-63$

$=6y^2-24y-51$

Put $y=-2$

$=6(-2{)}^2-24(-2)-51$

$=6\times 4+48-51$

$6\times 4+48-51$

$24+48-51$

$=21$