The hypotenuse of a right triangle is 20cm. The sumof the lengths of the legs is 28cm. find length of legs?

well it will be negative because the hypotnuse is smaller than the length so i think it will be 19.6 squared. cuz 20 times 20 =400 and 28x28=784 and 400-784= -384 adn 19.6x19.6=384.16 hope i could help