Factor 6x^2 + 13x + 5.
A) (2x + 1)(3x + 5)
B) (3x + 1)(2x + 5)
C) (2x + 1)(4x + 5)
D) (2x + 5)(3x + 5)
2007-06-03 08:05:54 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
A) IS THE ANSWER
2007-06-03 08:07:28 · answer #1 · answered by sweet n simple 5 · 0⤊ 0⤋
A)
Details:
6x^2+13x +5
The best way to find the routs of the equation is to apply the law, namely x= {-b +or- sqrt(b^2 -4ac)} /2a
that is -13 + or - sqrt(169-4*6*5)/ 2*6
={ -13 + or - 7}/12 = -20/12 or -6/12
X= -5/3 or -1/2
Therefore to substitute these values into the two factors to Get x = -5/3 or -1/2, the factors must be (2x+1)(3x+5)
Have a good day!
2007-06-03 15:08:33 · answer #2 · answered by lonelyspirit 5 · 0⤊ 0⤋
It's A because
(2x)(3x)=6x^2
(5 x 2x)=10x and (1 x 3x)=3x
10x + 3x= 13x
(5 x 1)=5
2007-06-03 15:14:50 · answer #3 · answered by B9O9R9I9C9U9A 3 · 0⤊ 0⤋
You can knock C out of the running, because 2x * 4x = 8x^2, not 6x^2.
You can knock out D, because 5 * 5 = 25, not 5.
So let's look at A and B, which both fit the First and Last of Foil.
For A, Outer and Inner = 3x + 10x = 13x
For B, Outer and Inner = 15x + 2x = 17x.
A is your answer.
2007-06-03 15:09:48 · answer #4 · answered by TychaBrahe 7 · 1⤊ 0⤋
the correct answer is A
2007-06-03 15:11:25 · answer #5 · answered by Actuary 2 · 0⤊ 0⤋
A
2007-06-03 15:10:26 · answer #6 · answered by Anonymous · 0⤊ 0⤋
A
2007-06-03 15:08:35 · answer #7 · answered by blueorion3 2 · 0⤊ 0⤋
Math is hard for girls.
2007-06-03 15:08:32 · answer #8 · answered by Leonard Moo 3 · 0⤊ 5⤋