SOLUTION: (2x + 1)^3

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Question 35063: (2x + 1)^3
Found 2 solutions by longjonsilver, Cintchr:
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
+%282x%2B1%29%5E3+ is just (2x+1)(2x+1)(2x+1). You need to multiply out 2 of the brackets and collect like terms and then multiply all that by the third bracket.

You should end up with a number of x^3, x^2, x and plain numbers.

Jon.

Answer by Cintchr(475) About Me  (Show Source):
You can put this solution on YOUR website!
+%282x%2B1%29%5E3+
lay out the three parts
+%282x%2B1%29%282x%2B1%29%282x%2B1%29+
Foil the first two quantities
+%284x%5E2%2B4x%2B1%29%282x%2B1%29+
Distribute out the second quantity across the first
+2x%284x%5E2%29+%2B+2x%284x%29+%2B+2x%281%29+%2B+1%284x%5E2%29+%2B+1%284x%29+%2B+1%281%29+
multiply
+8x%5E3+%2B+8x%5E2+%2B+2x+%2B+4x%5E2+%2B+4x+%2B+1+
Combine like terms
+8x%5E3+%2B+12x%5E2+%2B+6x+%2B+1+
Done