Question

Simplify the expression and evaluate as given

3y (2y - 7) + 3 (y - 4) - 63 For y = -2

Answer 1

3×-2 (2×-2-7)+3 (-2-4)-63
-6-11+3-6-63
82 is the answer

Answer 2

=3y(2y-7)+3(y-4)-63
=6y²-21y+3y-12-63
=6y²-18y-75
putting y=-2
=6(-2)²-18(-2)-75
=6×4+36-75
=24+36-75
=60-75
=-15