is this an actual math equation 9 + (2r -6r) x r =
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9 + (2r -6r) x r
Distribute the r and you get...
9+2r^2-6r^2
Add or subtract like terms and you get...
=9-4r^2
Distribute the r and you get...
9+2r^2-6r^2
Add or subtract like terms and you get...
=9-4r^2
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