Posted by **ROCKY** on Sunday, July 24, 2011 at 1:37am.

factor by grouping if possible and check

5x^3+4x^2-10x-8

- algebra -
**MathMate**, Sunday, July 24, 2011 at 8:01am
5x^3+4x^2-10x-8

Note that the coefficients are

5,4, -10,-8

with 5,4 as a common factor

=5,4, -2(5,4)

So we can factorize by grouping.

5x^3+4x^2-10x-8

=x^2(5x+4) -2(5x+4)

Taking (5x+4) as the common factor

=(x^2-2)(5x+4)

would be the answer for rational factors.

Further factoring into

(x+√2)(x-√2)(5x+4)

is possible but two of the factors are not rational.

which are in the same proportion

## Answer This Question

## Related Questions

- Intermediate Algebra - Factor by grouping, if possible, and check 5x3 + 4x2 &#...
- Algebra 1 (Reiny) - Factor each polynomial by grouping. Check your answer. 1. 2r...
- FACTORING - I can't figure out how to factor this. I know you use the technique ...
- algebra - Andrew factored the expression 28x©ø-6x©÷-10x as 2x(14x©ø-3x©÷-5x) . ...
- Factor (Math) - Factor by grouping if possible. z^3+3z^2+7z+21
- Algebra HELP - h(x)= 3x^(5) + 2x^(4) + 15x^(3) + 10x^(2) - 528x - 352 for this ...
- math,help,factoring - i need help i don't know how to do the next step. factor ...
- Algebra 1 Answer Evaluation - Factor. 1. 30y^3 - 50y A: 10y(3y - 5y) 2. Factor ...
- math,correction - can someone check these for me please.... problem#4 Directions...
- Algebra I - Thanks Reiny, but I'm still lost. I understand how you multipled by ...

More Related Questions