SOLUTION: Can you help me maybe?(: Factor 200t + 8t^3 - 80t^2. If at all possible to help?(: Factor -3bk^2 + 9bk - 6b. Annd, Factor the following polynomial completely. -x^2y^2

Question 614854: Can you help me maybe?(:
Factor 200t + 8t^3 - 80t^2.
If at all possible to help?(:
Factor -3bk^2 + 9bk - 6b.
Annd,
Factor the following polynomial completely.
-x^2y^2 + x^4 + 4y^2 - 4x^2

--Please oh please help with these?(:
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
just solved all of these ... will copy solutions

grouping ___ (-x^2y^2 + 4 y^2) + (x^4 - 4x^2)
factoring ___ -y^2(x^2 - 4) + x^2(x^2 - 4)
rearranging ___ (x^2 - y^2)(x^2 - 4)
factoring (again) ___ (x + y)(x - y)(x + 2)(x - 2) ___ difference of squares, twice

8t(t^2 - 10t + 25)
8t (t - 5)^2

-3b(k^2 - 3k + 2)
-3b (k - 2) (k - 1)
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