book Maths Puzzle Numerical Ability

Solve to find all the roots of the following equation:

4w^2 = -2w + 6

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book Other Question

I am having trouble simplifying. I know it sounds silly but I have never seen this one or dont remember it. I thought that expanding the problem and elimination would be the answe Please help me solve this problem: Can you find a number less than 200 that is divisible by four different prime numbers? Why or Why not?