3 {}^(2) + ( - 4 {}^(2) ) + 5 {}^(2)I'm confused on that can you help me please?

Question

`3 {}^(2) + ( - 4 {}^(2) ) + 5 {}^(2)`I'm confused on that can you help me please?

Answer 1

We have to replace the values in the equation

`x^2+y^2+z^2=(3)^2+(-4)^2+(5)^2=9+16+25=50`

Since the square of a negative number is a positive number, (-4)^2 = +16