SOLUTION: how do you evaluate algebraic expressions? Examples: n2- 25 = ? ^^ the two next to the n is the squared symbol, so the equation is really: n-squared minus twenty five

Question 627633: how do you evaluate algebraic expressions?
Examples:
n2- 25 = ?
^^ the two next to the n is the squared symbol, so the equation is really:
n-squared minus twenty five
Could you please answer my first question and the equation?
Thanks!
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
write it:
n^2 - 25 = 0
add 25 to both sides and you have
n^2 = 25
n =
n = +5
and
n = -5
:
Check replace n with 5:
5^2 - 25 = 0
and
replace n with -5
(-5)^2 - 25 = 0
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