simplify (9y^2-2)+(y^2-4)?
the ^ next to the 2 means it is an exponet
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the ^ next to the 2 means it is an exponet
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(9y^2-2)+(y^2-4)
Remove parentheses (there's nothing but the implied "1" to distribute):
9y^2-2 + y^2-4
Combine like terms:
9y^2 + y^2 - 4 - 2
10y^2 - 6
Done.
10y^2-6