exam Maths Puzzle Numerical Ability

(3x+y)^5

Set up is
1 5 10 10 5 1

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exam Other Question

The sum of the coordinates of the solution to the system
2x-y=7
3x-2y=11
is?
find the center and radius of the circle given by x(squared)- 4x + y(squared) -6y + 12 = 0