exam Maths Puzzle Numerical Ability

slove algebraically log base 4 (x+41)- log base 4(2x-5)=2

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exam Other Question

Please help me factor the polynomial. Thanks

49r^2+81s^2 I just want to make sure I have done this problem correctly. The problem is

Find the product

(m^3-4mn^2)(6m^4n^2-3m^6+m^2n^4)

I believe the solution using the associative