To DaveC:
Your calculator has flat batteries maybe
Im getting 4 on both my casios (fx602p, fx82super)
If your Casio calculator is capable of multi-termed equasions, then you should have gotten
-4.
To Everyone Else:
According to my
TI-85:
According to Javascript:
- <a href="javascript:alert(-2^2);" target="_blank">javascript:alert(-2^2);</a> <- click
According to
MATLAB 6.5:
According to
Python 2.3.4:
According to "Beginning & Intermediate Algebra (3rd Ed)" by K. Martin-Gay (ISBN
0-13-144442-5)
- 1.4 Calculator Explorations, Order of Operations (p.30):
Some calculators follow the order of operations, and others do not. To see whether or not your calculator has the order of operations built in, use your calculator to find 2 + 3 · 4. To do this, press the following sequence of keys: [2] [+] [3] [x] [4] [=] (or [enter]). The correct answer will be 14 because the order of operations is to multiply before we add.
I'm guessing your Casio does not support order of operations.
5.1 Exponents (p.288):
As we reviewed in Section 1.4, an exponent is a shorthand notation for repeated factors. For example, 2 · 2 · 2 · 2 · 2 can be written as 2^5. The expression 2^5 is called an exponential expression. It is also called the fifth power of 2, or we say that 2 is raised to the fifth power. The base of an exponential expression is the repeated factor. The exponent is the number of times that the base is used as a factor.
Example:
c. (-4)² = (-4) (-4) = 16
d. -4² = -(4 · 4) = -16
Notice how similar -4² is to (-4)² in the example above. The difference between the two is the parentheses. In (-4)², the parentheses tell us that the base, or repeated factor, is -4. In -4², only 4 is the base.
Helpful Hint:
Be careful when identifying the base of an exponential expression.
Pay close attention to the use of parentheses.
In (-3)² the base is -3. (-3)² = (-3) (-3) = 9
In -3² the base is 3. -3² = -(3 · 3) = -9
In 2 · 3² the base is 3. 2 · 3² = 2 · 3 · 3 = 18
I hope this helps clear any confusion.
- Raccoon
