exam Maths Puzzle Numerical Ability

April, Mae, june and Julie were born in consecutiveyears, in that order, with april being the oldest. All they will tell you is that the sum of the squares of their ages is 5. How

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a= 6-j8 ; b= 5+j12 ; c= 5+j8.66


b/ja-c= ??


ab + c/j5 =??

Please help I need a refresher have not done this in over two years
please help me to solve this problem: find the intersection the parabola y^2 + -8x and the circle X^2 + y^2 -2x -24 = 0