If anyone knows, please help. I have to answer this in the form of a rational expression. This is not like algebra 14 years ago. Man oh man!! Thanks in advance to all of you math genuises. :)
2007-07-04 02:10:54 · 9 answers · asked by Poetry 1 in Science & Mathematics ➔ Mathematics
x^2 - 13x + 42 = (x-6)(x-7) when factored also
x^2 - 36 = (x-6)(x+6) when factored
so
(x^2 - 13x + 42) / (x^2 - 36)
=(x-6)(x-7) / (x-6)(x+6)
= (x-7) / (x+6) ..........provided x ≠ 6
the end
.
2007-07-04 02:15:13 · answer #1 · answered by The Wolf 6 · 2⤊ 0⤋
(x^2-13x+42) =(x-7)(x-6) A
(x^2-36)=(x-6)(x+6) B
so, WHEN A is divided by B IT GIVES
(X-7) /(X+6)
2007-07-04 02:47:24 · answer #2 · answered by shivvy 1 · 0⤊ 0⤋
(x^2 - 13x + 42) / (x^2 - 36)
= (x-7)(x-6)/ (x-6)(x+6)
=(x-7)/(x+6)
2007-07-04 02:21:36 · answer #3 · answered by cllau74 4 · 1⤊ 0⤋
=simplify the expression in the numerator and denominator. => (x-7)(x-6) / (x+6) (x-6)
= cancel out the (x-6) in the numerator and denominator to have (x-7) / (x+6)
therefore the answer is (x-7) / (x+6).
2007-07-04 02:36:40 · answer #4 · answered by esuomyekcim 2 · 1⤊ 0⤋
(x^2 - 13x + 42) / (x^2 - 36)
= [(x-6)(x-7)]/[(x-6)(x+6)]
= (x-7)/(x+6)
2007-07-04 02:20:35 · answer #5 · answered by Anonymous · 1⤊ 0⤋
(x^2 - 13x +42 ) (X^2 - 36)
(x^2-6x-7x+42) (X^2-6^2)
x(x-6) -7(x-6) (x-6)(x+6) i.e. (x^2 -y^2) = (x-y) (x+y)
(x-7) (x-6) (x-6) (x +6)
(x-6) (x+6) (x-7)
2007-07-04 02:24:02 · answer #6 · answered by Don 3 · 0⤊ 1⤋
[(x-6)(x-7)]/[(x-6)(x+6)] =
(x-7)/(x+6)
2007-07-04 02:15:39 · answer #7 · answered by Anonymous · 1⤊ 0⤋
= [ (x - 7).(x - 6) ] / [ (x - 6).(x + 6) ]
= (x - 7) / (x + 6)
Don`t give in----don`t let it beat you!!!
2007-07-04 07:24:17 · answer #8 · answered by Como 7 · 0⤊ 0⤋
confirming Tom's answer
2007-07-04 02:19:59 · answer #9 · answered by LGscience 2 · 1⤊ 1⤋