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-5x2+9x-4 -5x2+9x+-4 Factors of -20 that add to equal 9 are -5 and-4 -5x2+5x+4x+-4 -5x(1x+1) + 4x(1+-1x)
9x is the lowest common multiple. (9x * 1 = 9x) (x * 9 = 9x)
2x2 - 9x + 4 = (2x - 1)(x - 4)
9x + 4 = 6 9x = 6 -4 9x = 2 x = 2/9
(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)