exam Maths Puzzle Numerical Ability

Please help.
Use the ac test to determine which of the following trinomials can be factored. Find the values of m and n for each trinomial that can be factored.
x^2 - 3x + 7

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exam Other Question

Find the slope and the y intercept of X+5=3Y 2) find the equation of the line (1,-1)&(3,9) 3) 3y =5+2 and x-3/5Y= -3 is perpendiculer, parallel neather. 4) find the equition of the horzontal line (13,-11) Please find X and Y: 2X + 3Y = 16, 5X - 3Y = 44.