Given the vector a = (- 2,2), B = (5, K), if the absolute value a + B does not exceed 5, then the value range of K is?

Given the vector a = (- 2,2), B = (5, K), if the absolute value a + B does not exceed 5, then the value range of K is?

a=(-2,2),b=(5,k)
a+b=(-2+5,2+k)=(3,2+k)
Because it's not more than five
So 3 ^ 2 + (2 + k) ^ 2