Question

2. Subtract: 3 l (l - 4 m + 5 n) from 4 l (10 n-3 m + 2 l)​

Answer 1

Answer:

Subtract 3l(l−4m+5n) from 4l(10n−3m+2l)

=4l(10n−3m+2l)−3l(l−4m+5n)

=(40ln−12lm+8l

2

)−(3l

2

−12lm+15ln)

=40ln−12lm+8l

2

−3l

2

+12lm−15ln

=25ln+5l

2