Find the sum of 4x2 - xy + 9 and x2 + 3xy - 2y2 4x2 + 2xy - 2y2 + 9 5x2 + 3xy - 2y2 + 9 5x2 + 2xy - 2y2 + 9 3x2 - 4xy + 2y2 + 9
4x^2 - xy + 9 + (x^2 + 3xy - 2y^2) = 4x^2 - xy + 9 + x^2 + 3xy - 2y^2 = 5x^2 + 2xy - 2y^2 + 9
s
Question
Updated 3/19/2016 6:29:43 PM
Rating
5
4x^2 - xy + 9 + (x^2 + 3xy - 2y^2)
= 4x^2 - xy + 9 + x^2 + 3xy - 2y^2
= 5x^2 + 2xy - 2y^2 + 9
Confirmed by jeifunk [3/20/2016 12:37:41 PM]

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What is the product of 3x2 - 4 and -x2 + 5x - 1?
Question
Updated 3/17/2016 12:31:59 PM
(3x^2 - 4) (-x2 + 5x - 1)
= - 3x^4 + 15x^3 - 3x^2 + 4x^2 - 20x + 4
= - 3x^4 + 15x^3 + x^2 - 20x + 4
32,746,400
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