Andrew M. answered • 04/25/17

Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

^{2}+7a - 18)

^{2}+ 7a - 18 is also factorable.

^{2}+7a-18 = (a+9)(a-2)

Amanda R.

asked • 04/24/17i need help on algebra 2

More

Andrew M. answered • 04/25/17

Tutor

New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

5a^3+35a^2-90a

You haven't told us what you need done with this expression.

Each term is factorable by 5a so we can factor that out giving:

5a(a^{2} +7a - 18)

The quadratic a^{2} + 7a - 18 is also factorable.

Look at the constant -18 ... see if there are

factors of -18 that add to the coefficient of the

middle term .. 7.

the factors of -18 that add to 7 are (9)(-2)

so a^{2}+7a-18 = (a+9)(a-2)

Your final factored form of the expression is:

5a(a-2)(a+9)

If you need the zeroes of this they are at

a = {-9, 0, 2}

Mark M. answered • 04/24/17

Tutor

5.0
(243)
Mathematics Teacher - NCLB Highly Qualified

5a^{3} + 35a^{2} - 90a

5a(a^{2} + 7a - 14)

Ask a question for free

Get a free answer to a quick problem.

Most questions answered within 4 hours.

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.

Amanda R.

04/24/17