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

If you have a 5% solution and a 50 % solution how much of each solution do you need to make 20ml of 30% solution? can someone help me find the value of the polynomial
-x^2-9x-6
I have
-5^2-9(5)-6
=-25-45-6
=-76