What is (a surd question) in the form a + b Root* something.
I vaguely recall a question being something like that. Please show working.
2007-09-19 04:37:34 · 2 answers · asked by hurrahx 2 in Science & Mathematics ➔ Mathematics
Thanks for your contribution PMP, but that is not what I was asking for.
They give you a numer or square root of something or whatever, and they'll ask you to put it into the form:
a + b./something .. or something. If anyone can see what I'm trying to say, that's be great!
2007-09-19 04:55:52 · update #1
...and neither do I need a definition of a surd, for the answer below PMP.
2007-09-19 05:09:51 · update #2
Okay...what's 4 + 2 * sqrt(2) + sqrt(8)?
This equals 4 + 2*sqrt(2) + sqrt(2*2*2)
which equals 4 + 2*sqrt(2) + 2*sqrt(2)
which equals 4 + 4*sqrt(2)
which equals 4(1 + sqrt(2))
How's that?
2007-09-19 04:46:55 · answer #1 · answered by PMP 5 · 0⤊ 0⤋
a surd is an ancient name for an irrational number. For example, sqrt(2) and sqrt(3) are surds. So are pi and e.
An irrational number is one that cannot be expressed as the quotient numbers such as a/b.
2007-09-19 11:51:26 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋