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-a^2 - 5a + 3
________________
-4a^2 -3a + 2
2) 2a^2 * 3a^3 = 6a^5
3) (3x^2y)(-5xy^3) = 15x^3y^4
4) a + 3
a - 4
___________
-4a - 12
a^2 + 3a
____________
a^2 - a - 12
5)10x^2y^3
___________ = -2xy
-5xy^2
Nota: cuando hay multiplicación los exponentes se suman y cuando hay división los exponentes se restan
-3a^2 + 2a - 1 - (a^2 + 5a - 3) =
-3a^2 + 2a - 1 - a^2 - 5a + 3 =
-4a^2 - 3a + 2
2)
2a^2 * 3a^3 = 6a^5
3)
(3 * x^2 * y) * (-5 * x * y^3) =
-15 * x^3 * y^4
4)
(a + 3) * (a - 4) =
a^2 - 4a + 3a - 12 =
a^2 - a - 12
5)
(10 * x^2 * y^3) / (-5 * x * y^2) =
-2 * x * y