SOLUTION: I know I have to rationalize the denominator, im just not sure how it works with a square root and real number. Help, please! Thanks, Elizabeth.
11
-------
√7 + 8
a
Algebra.Com
Question 163585: I know I have to rationalize the denominator, im just not sure how it works with a square root and real number. Help, please! Thanks, Elizabeth.
11
-------
√7 + 8
and
3
--------
2√5 - √7
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I know I have to rationalize the denominator, im just not sure how it works with a square root and real number. Help, please! Thanks, Elizabeth.
11
-------
√7 + 8
//////////////////
Use the "conjugate" to get rid of radicals in the DEN. Multiply NUM and DEN by
[11*(sqrt(7) -8]/(7 - 64)
= -
Multiplying by the "conjugate" is something you'll see more of to deal with radicals and imaginaries.
and
3
--------
2√5 - √7
----------------
Same approach, multiply by
=
=
RELATED QUESTIONS
Im in college math, its kinda embarrising to say this but I forgot a little bit about... (answered by richard1234,MathLover1)
square root 4/11
Instructions are to simplify. I am not sure if the way I have this... (answered by Nate)
rationalize the denominator and simplify 5sqrt8x^29/81x^8
i rewrote it as 5sqrt8x^29... (answered by edjones)
I need help with this one. *Rationalize the denominator. Assume that no radicands were... (answered by Earlsdon)
I need to rationalize the denominator and assume all variables represent positive real... (answered by Fombitz)
2/(3+square root of x)
I need to rationalize the denominator but I don't know... (answered by jim_thompson5910)
Hello!
I have these few problems and just want to make sure I have them correct.
1. (answered by Alan3354)
Rationalize the denominator and simplify.
sqrt(6)/4sqrt(3) + sqrt(2)
I am having a (answered by rapaljer)
I need to solve 8 ÷ cube root of 3.
I know in order to find this, I need to rationalize... (answered by josgarithmetic)