Friday

April 18, 2014

April 18, 2014

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

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

- algebra -
**MathMate**, Sunday, July 24, 2011 at 8:01am5x^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

**Related Questions**

Intermediate Algebra - Factor by grouping, if possible, and check 5x3 + 4x2 &#...

Math - Can someone please check my answers below for accurateness? The ...

Algebra 2 - Can someone check my answers. Write the following equations in ...

algebra - Factor by grouping 5x^3-5x^2-x+1 Would it be? (x-1)(5x^2-1) or (5x^2-1...

algebra - Andrew factored the expression 28x©ø-6x©÷-10x as 2x(14x©ø-3x©÷-5x) . ...

math,help,factoring - i need help i don't know how to do the next step. factor ...

FACTORING - I can't figure out how to factor this. I know you use the technique ...

algebra - factor by grouping x^3-5x^2+5x-25

how about his one - -7+ 5x = 10x-2? im not sure I know its -1, but im not sure ...

Math - factor each expression completely. if possible. Just checkin the * Ones 1...