book Maths Puzzle Numerical Ability

here is my question, the coordinates of the point have equal absolute value, the point is in teh second quadrant, and the distance of the point from teh origin is 2. x= and y= .

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The enrollment in a small community college is 4288. If 49% are females estimate the number of females enrolled I need help 25x exponent 2 -49x exponent 2