Question

Subtract the sum.
Please help me :(​

Answer 1

Answer:

a) 8a-2ab+2b-15

b)2xy-7yz+5zx+10xyz

Step-by-step explanation:

a)4a-7ab+3b+12 from 12a-9ab+5b-3

12a−9ab+5b−3−(4a−7ab+3b+12)

=12a−9ab+5b−3−4a+7ab−3b−12

=8a−2ab+2b−15

b)3xy+5yz-7zx from 5xy-2yz-2zx+10xyz

5xy−2yz−2zx+10xyz−(3xy+5yz−7zx)

=5xy−2yz−2zx+10xyz−3xy−5yz+7zx

=2xy−7yz+5zx+10xyz

I hope that it helps you...