exam Maths Puzzle Numerical Ability

Please show me how to factor completly 4a^4-26a^2+30

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exam Other Question

im not quite sure what steps need to be taken to find the answer of the problem Can some one please help me help my grandson with this problem.??
Q: Assuming x is a positive #, useing the Logorithim properties to present the expression; log(x+4) - log x as the logorithim of a single quantity.

Thank you very much.