simplyfy please (-5x^2y^5)(-7x^7 y^4) ?
回答 (6)
2008-08-26 8:52 am
✔ 最佳答案
(-5x^2y^5)(-7x^7y^4)= (-5)(-7)(x^2)(x^7)(y^5)(y^4)
= [35][x^(2 + 7)][y^(5 + 4)]
= [35][x^9][y^9]
= 35x^9y^9
2008-08-26 2:51 pm
I am assuming that the space in the second brackets is accidental and these are all pure multiplications and exponentiations.
These group thus:
(-5)(-7)x^2*x^7*y^5*y^4
= 35x^9y^9
These group thus:
(-5)(-7)x^2*x^7*y^5*y^4
= 35x^9y^9
2008-08-26 3:16 pm
looks hard
2008-08-26 2:58 pm
(-5x²y⁵)(-7x⁷y⁴) = (-5)(-7)(x²x⁷)(y⁵y⁴)
= 35x⁹y⁹
= 35x⁹y⁹
2008-08-26 2:57 pm
its been a few years since high school but it looks good
-y^4x^2(5y)(7x^5)
-y^4x^2(5y)(7x^5)
2008-08-26 2:50 pm
ohmy god
good luck. =]
good luck. =]
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