if a - b = 3 and a ( power 2 ) + b ( power 2 ) = 27 , find the value of ab .
"2 ab = ( a ( power 2 ) + b ( power 2 ) - ( a - b ) ( power 2 ) = 27 - 9 = 18 ab = 9 . answer is b ."
divide(subtract(27, power(3, 2)), 2)