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December 19, 2014

December 19, 2014

Posted by **b6** on Monday, January 21, 2013 at 3:52pm.

I did2(3)^3+4(3)^2-3(3)^2-6(3)

2(27)+4(9)-3(9)-6(3)

54+36-27-18

90-27-18

63-18

45

is this correct?

Thanks

- math -
**Steve**, Monday, January 21, 2013 at 3:58pmlooks good to me.

might have saved some work by combining 4x^2-3x^2 to be just x^2 before evaluating

or, you could have factored it a bit:

2x^2(x+2) - 3x(x+2) = x(2x-3)(x+2)

= 3(3)(5) = 45

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