Asked by Gray
Simplify (3x-2)^3 - (4x+5)^2
Answers
Answered by
Henry
(3x-2)^2(3x-2)-(4x+5)^2 =
(9x^2-12x+4)(3x-2)-(16x^2+40x+25) =
27x^3-36x^2+12x-18x^2+24x-8-16x^2-40x-25
= 27x^3-70x^2-4x-33.
(9x^2-12x+4)(3x-2)-(16x^2+40x+25) =
27x^3-36x^2+12x-18x^2+24x-8-16x^2-40x-25
= 27x^3-70x^2-4x-33.
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