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## Making Math Matter...and Easy to Understand!

### Murrieta, CA (92562)

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# Brian's Responses in WyzAnt Answers

#### -16+49h^2 factor the polynomial

factor the polynomial

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Asked by Michelle from Temecula, CA
20

This is a difference of squares pattern which factors to a Sum & Difference:  49h^2-16, which factors to (7h+4)(7h-4)

#### how to solve the inequality

how to solve the inequality 4(5y+1)≥-36. Then write the answer in interval notation.

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Asked by Kayla from Santee, CA
10

Hello Kayla,

It looks like Lindsey copied the wrong question.  As for the inequality above, I would divide both sides by 4 vs. distributing the 4...it will save you time and reduce your chances for errors...than subtract 1 from both sides with the last step being divide both sides by 5...which will result in y > -2

#### Solve the inequality (x^2(9+x)(x-6))/((x+5)(x-2))> or equal to 0

This is a fraction     x^2(9+x)(x-6) is the numerator  (x+5)(x-2) is the denominator and it's all set to greater than or equal to 0

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10

Multiply both sides by the denominator, which will leave us with the numerator >= to zero, than look at the critical point that make the numerator go to zero, namely 0, -9 , and 6.  Next test points to the right and left of these values to see if it makes the inequality true...remember x cannot equal -5, or +2 because of the denominator. Start testing regions between these critical points to locate the solution regions.

#### Factor the expression completely.

9x^3 + 72

Select the correct choice below.

(a) 9x^3 +72=?

(b) The polynomial is prime.

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Asked by Jamal from Oregon, OH
00

Its a Sum of Cubes pattern:  (a+b)(a2-ab+b2)....First factor out the "9" ... 9(x+2)(x2-2x+4)

#### (4x^2+34x+39)/(x+7)=

(4x^2+34x+39)/(x+7)=

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Asked by Joe from Brooklyn, NY
00

Use Synthetic Division:

-7 | 4   34   39         4    (34-28)    (39-42)    =    4X + 6 - 3/(x+7)

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## Background Check Status for Brian B.

Brian B. passed a background check on 3/4/2013. You may run an updated background check on Brian once you send an email.