Respuesta :

-4 for the first one and 2/3 for the second
the second one is -4. the square root of 64 is 8 and the square root of 144 is 12. 8-12 is -4.

oops i went out of order sorry

the first one is is 2/3. although you may think it is 4/9, 4/9 is not fully simplified.