exam Maths Puzzle Numerical Ability

please help me figure out this problem. I think I know the answer but I cant figure out how to get there. [3x-2y]^2. I can only come up with 9x^2+4y^2. please help.

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exam Other Question

Directions: Graph the absolute value inequalities.

|x+2y| greater than or equal to 6
5x-y=10
2x+y=4