Which equations are correct?
select each correct answer.
-4b^3 (5b^2+3) = -20b^6-12b^3
-6y^4 (4y^2+2) = -24y^8-12y^4
-4x^2 (2a^2+5) = -8x^4-20x^2
-5a^4 (2a^2+4) = -10a^6-20a^4
which expression is equal to (6x-4) (3x-1) ?
a. 18x^2-18x-5
b. 9x^2-6x-5
c. 18x^2-18x+4
d. 18x^2 + 18x-4
which expression is equal to (x+4) (-3x^2-4x+2)
a. - 3x^2-4x+8
b. - 3x^3-16x^2-14x+8
c. - 3x^2-3x+6
d. - 3x-4x^2+2x+8
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