Math, asked by joshinmon38, 5 months ago

1. Simplify the expression and find its value if y = -2
3y (2y - 7)-3 (y - 4)-63​

Answers

Answered by chinmaya44
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 manojpetal
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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