book Maths Puzzle Numerical Ability

log(x)^2=2logx This one is also true right? Thank you for you help.

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could you please help me with this problem? any help would greatley be appreciated..thank you ahead of time



{{{(x^2+3x)/(5x+15)=x(x+3)/5(x+3)}}}
2 to the second
power d3 zs