WHAT is the answer? square root of 32 times the square root of 144



Break 32 and 144 down into prime factors





So rewrite the problem as



Write all as one square root:





Now pair up like factors which can be paired:



Write each pair of like factors as the square
of the factor



Now take individual square roots:



Now use the fact that the square root of the square of
a non-negative number is the non-negative number. 



Edwin