how do u factor 2x^3+54 sum of two cubes?

2007-03-11 07:38:00 · 2 answers · asked by Ballerina 5 in Science & Mathematics ➔ Mathematics

a^3 + b^3 = (a+b) (a^2 - ab + b^2)

take out the 2

2(x^3 + 27)

2 (x^3 + 3^3)

2 (x+3) (x^2 - 3x + 9)

2007-03-11 07:41:43 · answer #1 · answered by 7 · 2⤊ 0⤋

Find out the roots
x^3 = -27 so x= -3 2x^3+54=(x+3)(2x^2-6x+18)

2007-03-11 07:44:19 · answer #2 · answered by santmann2002 7 · 1⤊ 2⤋

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