exam Maths Puzzle Numerical Ability

What are the properties or rules in multiplying and dividing radicals?

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exam Other Question

While only 19 year old, Carl Friedrich Gauss proved in 1796 that every positive integer is the sum of at the most three triangular numbers.
a) Express each of the numbers 25 to 35 i am trying my hardest to find somewhere online to where i can find STEP by STEP instructions on how to solve algebra equations, i am going into the military and i would like to improve my math score on the ASVAB, so is there any site that does this?