(4b^4+2) - (7b^2-5) - (6b^4-2b^2)

How do you exactly solve/simplify this? I get confused with the signs when it comes to adding/subtracting terms like these. Thanks much!

1 answer

Remember two rules.
1. Remove parentheses, changing the signs inside the parentheses IF the outside side is negative but not changing if the outside sign is +.
2. Combine like terms.

(4b^4+2) - (7b^2-5) - (6b^4-2b^2)

4b^4+2-7b^2+5-6b^4+2b^2=

Now just add like terms and go from there if it can be simplified further.
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