exam Maths Puzzle Numerical Ability

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

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exam Other Question
Given X^2+XY+AY^2=B and A=1, B=7, find the x intercepts. Find the product:
[3 -1]
0 4] [2 -1 3]
2 1] [0 -2 4]




Find the product:
[3 -7] [0 -4
[1 2] [5 -3]