1. a)
[tex]x^{2} = 25 * 16 = 400\\=> x = 20\\y^{2} = 25 * 9 = 225\\=> y = 15[/tex]
b)
[tex]x^{2} =6*9=54\\=>x=7.34\\y^{2} =3*9=27\\=>y=5.19[/tex]
