you need to factor by guadradic form
6x^3+21x^2+15X
my answer is 3x(2X^2+7x+5)
2007-03-11 08:23:58 · 4 answers · asked by Ballerina 5 in Science & Mathematics ➔ Mathematics
6x³ + 21x² + 15x
3x(2x² + 7x + 5)
Find the sum of of the middle term
multiply 2 times 5 = 10 and factor
2 x 5 = 10
factors of 10 = 1, 2, 5, 10
2 and 5 satisfy the sum of the middle term
3x(2x² + 7x + 5
3x(2x² + 2x + 5x + 5)
3x[2x(x + 1) + 5(x + 1)]
3x(2x + 5)(x + 1)
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you did great, but the the equation needed further factoring.
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2007-03-11 08:42:35 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
You then have to factor the trinomial
so the final answer is 3x(2x+5)(x+1)
2007-03-11 15:29:25 · answer #2 · answered by hayharbr 7 · 0⤊ 0⤋
Correct so far but can go a step further:-
3x.(2x² + 7x + 5) = 3x.(2x + 5).(x + 1)
2007-03-11 15:41:54 · answer #3 · answered by Como 7 · 0⤊ 0⤋
Yes your answer IS correct! Very good!
2007-03-11 15:29:06 · answer #4 · answered by physicist 4 · 0⤊ 0⤋