Friday

March 27, 2015

March 27, 2015

Posted by **mace** on Thursday, February 21, 2013 at 8:00pm.

- MATH -
**JJ**, Thursday, February 21, 2013 at 8:14pm9x^2 + 5x - 4

the AC method

Multiply the 9 times -4

You have -36

think of factors that will multiple to equal -36 but add to equal the middle number 5.

36 times -1 no

9 times -4 yes

Sometimes it takes awhile to find the right numbers.

Once you do, you write them and -4x + 9x

You replace the middle term with them.

9x^2 -4x + 9x - 4

Next, you factor by grouping

(9x^2 -4x) + (9x - 4)

Take out the common factor in each group.

x(9x-4) + 1(9x-4)

see the (9x-4)... you write that down once and get your other factor from what is left over (x+1)

FINAL ANSWER: (9x-4)(x+1)

Multiply those factors to check to be sure you are correct.

**Answer this Question**

**Related Questions**

algebra problem that is causing me headaches - I have no real method for this ...

algebra,math - My qustion is for the following the problem reads as follows (x-1...

Math (Algebra 2) - Factoring by Using a Quadratic Form Problem: x^4 + 8x^2 - 20 ...

MATH - Y^3+Y^2-4Y-4 AND T^2+4Z^2 THESE ARE FACTORING QUESTIONS CAN SOME ONE ...

Math - Solving quadratic equations by completing the square. Could you show me ...

Math Algebra - Resolve(17x²+14x + 9) – (-13x² +6x - 12) 30xsquared+20x+21 I'll ...

Math - evaluate the expression ₆ P ₀ I am not sure how to do this ...

7th grade math - How would you solve the problem below using subsitution method...

chemistry - This question I really don't get it. I tried tried tried to figure ...

algebra - Can someone please show me how to solve this problem step by step ...