Answer:
choice 2) 21x^3 - 12x^2y^4
Step-by-step explanation:
3x^2(7x - 4y^4) = 21x^3 - 12x^2y^4
this might help.......
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1/-4
(2,-3),(-2,-2)
-2 + 3/ -2 - 2
x=1/4 , y=-1/4. You can confirm this by substituting the numbers in.
a=13
-90=-6a-12
-6a=-78
