2x2-9x+4 = (2x-1)(x-4) when factored
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(x + 3)(3x - 2)
Assuming it's a plus sign, that factors to (2x + 1)(x + 4)
9x2 - 18x + 99(x2 - 2x + 1)==========
9x squared plus 16 = 0 factored is plus and minus 4/3 i.
2x2+9x+9 = (2x+3)(x+3) when factored