It is: 5x
You can factor a five out of 15 plus 5x. Therefore, 15 plus 5x factors out to 5(3+x). Hope it helps :)
5x
-15x2+5x=-5x(3x-1)
5(x2 + x + 1)
One factor of 6x² + 5x - 11 is (x - 1).
x(x2+5x+6)
(x - 5)(5x - 7)
(6 - 5x)(6 - 5x)
x2 + 5x - 120 can not be factored.
2X2+5x-12 4+5x-12 -8+5x 5x-8
First factor is x, but we need to know the sign of 5x in your equation...