Q82 of 128 Page 224

Subtract:
7p (3q + 7p) from 8p (2p -7q)

The subtraction is as follows:

Here 8p(2p-7q) = 16p²-56pq and

7p(3q + 7p) = 21pq + 49p²

Therefore,

The result is as follows: -33p²-77pq

Subtract:

3t⁴–4t³ + 2t²–6t + 6 from -4t⁴ + 8t³-4t²-2t + 11

Subtract:

2ab + 5bc–7ac from 5ab–2bc–2ac + 10abc

Subtract:

-3p² + 3pq + 3px from 3p (-p-a-r)

Multiply the following:

-7pq²r³, -13p3q²r

Subtract:7p (3q + 7p) from 8p (2p -7q)