8b^3 -27
The answer is, 4b^2 +6b +9 , but u must show the steps.. ;o)
2007-12-06 05:27:04 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
You have a difference of cubes.
(2b)^3 - (3)^3
The formula is:
(x - y)(x² + xy + y²)
That means you should get:
(2b - 3)((2b)² + (2b)(3) + 3²)
(2b - 3)(4b² + 6b + 9)
If you are *factoring* you should keep both parts. If you are dividing by (2b - 3) then you would just have the part you had in your answer.
2007-12-06 05:31:18 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
8b³ - 27
in general
(a³ - b³) = (a - b)(a² + ab + b²)
so factoring your equation would be
(2b - 3)(4b² + 6b + 9) and this IS the real solution
based on standard math tables
you must have been given a term to factor by like (2b-3)
2007-12-06 05:42:13 · answer #2 · answered by Jim L 3 · 0⤊ 0⤋