exam Maths Puzzle Numerical Ability

how can I find how many solutions are in an equation like this one?
0=x^2-5x+6

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exam Other Question

hi i need some help with graphing inequalities i understand some of it, but not all of it. like for example i need help with y_< 2x+4 Divide: (2x^3 - x^2 + 3x - 1) / (x + 2)