exam Maths Puzzle Numerical Ability

I need to come up on showing how to answer the square root of 74. It was from a question that started from 5 to the 2nd power + 7 to the second power which I believe is 74 so I nee

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exam Other Question

Find the constant of variation k m varies directly with n; m=144 when n=8 Please help solve this
4x^2+8x-60