6h^2-h-12 apply the foil method : (a+b)(c+d)=ac+ad+bc+bd
Idk how many start cards there are o this problem cant be solved...
Can you take the quantity [ x + y ] and square it ?
Can you take the quantity [ x + 2y ] and square it ?
Then you should have no trouble with the square of (.9x + .8y) .
The square of any binomial (expression with 2 terms) is
(square of the first term)
+ (square of the second term)
+ 2 times (product of the terms) .
The solution to your problem is 8 (:
