Find the answer:
Square root (-8)^2 +(-6)^2
=.......
A)I-10I (Absolute value)
B) + or - 10
Well The answer book says A.. but i always knew that square root of a number = -+ of it not only +..
why here ?
This is always confusing....UNLESS we are solving an equation...by convention.....we always take the positive root
So
√ [ (-8)^2 + (-6)^2 ] = √100 = 10
And
l -10 l = 10
So.....
"A" is correct
