Which of the follwing is a factor of the polynomial xsquare-x-20
2006-11-28 07:59:44 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
-5 and 4
x^2-x-20
(x^2-5x)+(4x-20)=0
x(x-5)+4(x-5)=0
(x+4)(x-5)=0
2006-11-28 08:05:01 · answer #1 · answered by Anonymous · 0⤊ 0⤋
factors out to
(x+4)(x-5)
so how did we get there
x^2 is easy x times x
- 20 is 4 times 5 and one has to be negative - (course it could have been 1 20, 2 10)
so which one - look to the middle number - it's a negative
that means the 5 has the - with it
best of luck!
2006-11-28 16:02:30 · answer #2 · answered by tomkat1528 5 · 0⤊ 0⤋
(x+4 ) (x-5) are the two factors
2006-11-28 16:03:09 · answer #3 · answered by Anonymous · 0⤊ 0⤋
( x-5)(x+4)
2006-11-28 16:19:30 · answer #4 · answered by Gardenia 6 · 0⤊ 0⤋
xsquare
2006-11-28 16:01:20 · answer #5 · answered by colodge_25 3 · 0⤊ 0⤋
xs= gQ Y = the fraction that existied when u have ur denominater so thats how id do it if it didnt help u srry?
2006-11-28 16:04:56 · answer #6 · answered by texasmonster10 2 · 0⤊ 0⤋
x is a factor of x²
2006-11-28 16:09:50 · answer #7 · answered by Canadian Princess 1 · 0⤊ 0⤋