- #1
PhysicsHelp12
- 58
- 0
Im in 2nd year of math now...so I know algebra but
I was reading this from this website:
"Substitution
Every time we replace a part of an expression with a value or another expression, we are using the technique of Substitution. And, every time a substitution is performed, parentheses are used!"
http://www.math.ohio-state.edu/~mcginnis/08Au%20M132N/Algebra%20Fundamentals.pdf
My question is...
when you substitute into an expression...eg.
e^x Sub in 2x+1 ...
Maybe a bad eg since I am typing it ...but if you were writing it on paper...
I wouldn't even think about it...id just write e^(2x+1) ...(No Brackets)
Or sub 2x for x in x+1 ...Id just write 2x+1
or sqrt(x^2+y^2) ...evaulated at x=1=y Id just go sqrt(1^2+1^2)
But do you ALWAYS imagine brackets in your head first...when youre doing these...
Because I am really worried that everyone else is doing this except me ..
I was reading this from this website:
"Substitution
Every time we replace a part of an expression with a value or another expression, we are using the technique of Substitution. And, every time a substitution is performed, parentheses are used!"
http://www.math.ohio-state.edu/~mcginnis/08Au%20M132N/Algebra%20Fundamentals.pdf
My question is...
when you substitute into an expression...eg.
e^x Sub in 2x+1 ...
Maybe a bad eg since I am typing it ...but if you were writing it on paper...
I wouldn't even think about it...id just write e^(2x+1) ...(No Brackets)
Or sub 2x for x in x+1 ...Id just write 2x+1
or sqrt(x^2+y^2) ...evaulated at x=1=y Id just go sqrt(1^2+1^2)
But do you ALWAYS imagine brackets in your head first...when youre doing these...
Because I am really worried that everyone else is doing this except me ..
Last edited by a moderator: