1. Simplify the expression and find its value if y = -2
3y (2y - 7)-3 (y - 4)-63
Answers
Answered by
1
Step-by-step explanation:
3y(2y-7)-3(y-4)-63
=6y^2-21y-3y+12-63
=6y^2-24y-51
for y = -2
6y^2-24y-51
=6(-2)^2-24(-2)-51
=6×4+48-51
=24+48-51
=21
Answered by
2
Step-by-step explanation:
y= -2
then 3y (2y - 7)-3 (y - 4)-63
= 3×(-2) {2×(-2)-7}-3(-2-4)-63
= -6 ( -4-7)-3(-6)-63
=-6(-11)+18-63
= +66-45
= 21 (ans)
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