exam Maths Puzzle Numerical Ability

Given X^2+XY+AY^2=B and A=1, B=7, find the x intercepts.

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exam Other Question

Someone please help me solve this problem, I am going to have similar ones on a test. Find three consecutive even intergers such that three times the second minus the third is 12 more than the first. what is the perimeter of a square if the length of the diagonal = 5?