Question

factor: 26x^2 - 159x - 65

Answer 1

(2x - 13)(13x + 5)

Answer 2

wow, that was fast... how did you get that??

Answer 3

find factors of -159??

Answer 4

I looked at 26 and 65... and can see 13 as a common factor

so assumed 13 x 2 and 13 x 5 and 13^2 = 169... just a case of putting it together

Answer 5

-159 = -13^2 +10

Answer 6

wow thank you.. it just seems so backwards to me.. I can work the quad. function no problem but factoring.. just confuses me to no end

Answer 7

well initially I thought about the general quadratic formula, which will give the factors... then saw 13 and 5 with 2 and 13

Answer 8

my teacher said to find the factors of a number that will add up to the sum of two numbers in the equation... I just get confused as to which number I need to find prime factors to

Answer 9

Would this be the correct way in beginning to factor out the problem?
26x2 - 159x – 65
2x2 - 132 + 10 – 5

Answer 10

Correction:
26x^2 - 159x - 65
2x^2 - 13^2 + 10 -5

Answer 11

and then?
2x^2 - 13^2 + 5

Answer 12

I worked out (2x - 13)(13x + 5) as FOIL.. and it's not adding up right...

Answer 13

2x * 13x = 26x^2
-13 *13x = -169x &&& like terms and add to - 159x
2x * 5 = 10x &&&
-13*5 = 65

Answer 14

(2x – 13)(13x+5)
26x2 + 10x – 159x – 65

Answer 15

(13x + 5) (2x – 13)
26x2 – 169x + 10x – 65
26x2 – 159x - 65

FIRST, OUTSIDE, INSIDE, LAST

Answer 16

just wish I knew how Luis got to (13x + 5) (2x – 13)