9x
5x * 9x = 45x2 =====
It is -9x plus 5.
-4
14
It is 9x * 5x square units = 45x2 square units.
(5x+4)(9x+9) FOIL First (5x*9x=45x**2) Outside (5x*9=45x) Inside (4*9x=36x) Last (4*9=36) 45x**2+45x+36x+36 45x**2+81x+36 9(5x**2+9x+4x)
9x-5x-2x = -4 2x = -4 x = -2
9x-5x=4x, 7/4=1.75, x=1.75
As written, -5x + 9x = 4x 4x - 4 = 4(x - 1) If that's -5x2 + 9x - 4, that factors to -(x - 1)(5x - 4)
2x + 5x - 1 = 9x 7x - 1 = 9x -1 = 9x - 7x -1 = 2x -1/2=x
5x