Question

Simplify (5a4b + 2a2b − 4ab) − (8a4b + 2a2b − 7ab).

Answer 1

`-3a^4b+3ab`

Explanation:

`(5a^4b+2a^2b-4ab)-(8a^4b+2a^2b-7ab)`

Step 1. Subtract
`5a^4b-8a^4b`

`5a^4b-8a^4b=-3a^4b`

Step 2. Subtract
`2a^2b-2a^2b`

`2a^2b-2a^2b=0`

Step 3. Subtract
`-4ab-(-7ab)`

`-4ab-(-7ab)=3ab`

Now combine all the terms together

`-3a^4b+3ab`