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Maths Puzzle
Numerical Ability
Find the center of the circle.
x^2+y^2-4x-12y+30=0
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book Other Question
what is the discriminant in the quadratic equation?
x2 + 11x + 121 = x + 96?
thank you
solve each system
4x+8y+z=2
x+7y-3z=-14
2x-3y+2z=23