Posted by Krissy on Tuesday, January 15, 2013 at 9:33am.
I have a few more questions that I'm not understanding. Its multiple choice however I would appreciate a breakdown on how to solve.
1.Evaluate without a calculator, using the order of operations. -2^2+20-|8-20|-squareroot of 64
2.Simplify the expression. Square root of -16
d. Not a real number
- College Algebra - Reiny, Tuesday, January 15, 2013 at 10:27am
-2^2+20-|8-20|-squareroot of 64
= -4 + 20 - 12 - 8
√-16 ----> not a real number
( in your first one, notice the difference between
-2^2 and (-2)^2 )
- College Algebra - Steve, Tuesday, January 15, 2013 at 10:29am
since x^2 >= 0 for all real x,
√-16 = 4i, a complex number
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