exam Maths Puzzle Numerical Ability

x^2-2xy-15y^2
x^2+x+1
5x^2+25x+30
x^2-xy-12y^2

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exam Other Question

3x + 5y - (3y x 7) simplify expression Leading men. Bob Hope was born 2 years after Clark Gable and 2 years before Henry Fonda. In 1951, after all three of them had their birthdays, the sum of their ages was 144. In what years were they born?