Use the quadratic formula.
x = -4.265564 or -0.234436
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2x + 9x simplified would be 11x
2x2+9x+9 = (2x+3)(x+3) when factored
2x2-9x+4 = (2x-1)(x-4) when factored
2x + 5x - 1 = 9x 7x - 1 = 9x -1 = 9x - 7x -1 = 2x -1/2=x
Assuming it's a plus sign, that factors to (2x + 1)(x + 4)