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December 18, 2014

December 18, 2014

Posted by **joyce** on Friday, July 23, 2010 at 8:54pm.

- algebra -
**Kate**, Friday, July 23, 2010 at 9:01pmUse the quadratic formula

(40 +/- sqrt((-40)^2 - 4(-6)(-50) ))/(2(-6))

what ever that comes out to be

- algebra -
**Henry**, Saturday, July 24, 2010 at 8:22pm-6q^2 - 40q -50.

Factor using the AC method:

-2(3q^2 + 20q + 25)

A*C = 3*25 = 75 = 5*15.

Replace 20q with 5q + 15q:

-2(3q^2 +5q+15q + 25).

Group the 4 terms in pairs that can

be factored:

-2(3q^2+15q + 5q+25).

Factor the 2 pairs:

-2(3q(q+5) + 5(q+5).

Factor out q+5:

-2((q + 5) (3q + 5)).

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