Divide by x: x(x2 - 20x + 19); = x(x -1)(x - 19)
x3 + 2x2 - 19x - 20 = x3 + x2 + x2 + x - 20x - 20 = x2(x + 1) - x(x + 1) - 20(x + 1) = (x + 1)(x2 + x - 20) = (x + 1)(x - 4)(x + 5)
19x
x^2-19x+90 (x-9) (x-10)
x=-2
(20x + 3)(1x + 1)
20x2 = 41x+9 20x2-41x-9 = 0 (5x+1)(4x-9) = 0 Therefore: x = -1/5 or x = 9/4
2(5x + 3y)(2x + 5y)
(2x+1)(2x+3) when factored
20x2 + 22xy + 6y2 = 20x2 + 10xy + 12xy + 6y2 = 10x(2x + y) + 6y(2x + y) = (2x + y)(10x + 6y) = 2(2x + y)(5x + 3y)
6x2+19x+10 = (2x+5)(3x+2) Length = 2x+5 Width = 3x+2
2x3 - 7 + 5x - x3 + 3x - x3 = 8x - 7