exam Maths Puzzle Numerical Ability

I need some help solving this problem. Can someone help me?

u^2+5u+7u+35

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exam Other Question

please help to multiply

(2x + 4)(3x^2 - 2x - 10) a water tank contains 230 L of water when it develops a leak. Water drips out at a rate of 1.5L/min. How long would it take for all the water to drip out?