Answer:
Answer: 41
The thing to evaluate: [tex]-(-4)+7(3)+(-4)^2[/tex]
The thing to type into the calculator: -(-4)+(7)(3)+(-4)^2
Step-by-step explanation:
So I like to put parenthesis around my inputs every single time so I don't go wrong. You can sometimes get away without doing it but sometimes your calculator will return incorrect value.
Your calculator returned incorrect value because you were suppose to enter [tex](-4)^2[/tex] instead of [tex]-4^2[/tex].
These values are different. The first is equal to (-4)(-4)=16 and the second is equal to -(4)(4)=-16.
Also if c=-4 then -c=-(-4).
So this is what I would type into my calculator:
-(-4)+(7)(3)+(-4)^2
If you want to perform the order of operations, you do:
1) Parenthesis (grouping symbols)
Notice your parenthesis here don't have any operations to perform.
So move on to the next step.
2) Exponents
You do have this as the end.
[tex]-(-4)+7(3)+(-4)^2[/tex]
[tex]-(-4)+7(3)+16[/tex]
3) Multiplication/Division as it occurs left to right
I see the opposite of -4 part and 7(3).
[tex]4+21+16[/tex]
4) Addition/Subtraction as it occurs left to right
[tex]25+16[/tex]
[tex]41[/tex]
