exam Maths Puzzle Numerical Ability

4. Perform the indicated operations:
(5x2 - 3x + 2) + (-3x2 - 5x - 8) - (x2 + 3x - 10)

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exam Other Question

Please help me reduce this equation: {{ 5x-[-3x-(-2y+5x)-(10x-3y-4x)] }}}.
Also the -3y-4x has a bar above it. Can you please help me solve: A 5 in. by 7 in. photograph is surrounded by a frame of uniform width. The area of the frame equals the area of the photograph. Find the width of the frame.