exam Maths Puzzle Numerical Ability

givin logb 2 = 0.387 and logb 5 = .0898, find logb square root of 20.

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exam Other Question

I need help with problem 43 in chapter 2 section 3.
The problem is x+7/6=2x-7/6
Distribute to simplify the following expression.

-4x2(3x2 - x + 1)