exam Maths Puzzle Numerical Ability

Geometry. A square has sides of length 3x - 2 cm. Express the area of the square as a polynomial.

Please help with this. Thanks.

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exam Other Question

give three rays with d as initial point I am stuck on this problem. Please help?

Find values for m and b so that the solution can be (-3,4).
5x+7y=b
mx+y=22