Why eliminate radicals in the denominator? [rationalizing the denominator]
50905
Why rationalize the denominator?
126230
Simplifying radicals for limit leads to extra minus symbol
67605
Different proof that $\sqrt{2}$ is irrational
37642
Why is $\pi$ irrational if it is represented as $C/D$?
80183
Deduction of "Disjunction elimination"
122786
C: The Math Behind Negatives and Remainder
58212
Why doesn't the quadratic equation contain $2|a|$ in the denominator?
99815
Dividing versus multiplying by inverse in modular arithmetic
87735
Prove that the roots $\in \Bbb R$ of $x^3+x+1=0$ aren't rational without RRT
26330
Why can we modular reduce arguments of sums and products in modular arithmetic?
41943
Why is it that when proving trig identities, one must work both sides independently?
126074
Proof of the irrationality of $\sqrt{3}$ - logic question
139897
Simplify with fractional exponents and negative exponents
150624
Why does the square root of a square involve the plus-minus sign?
127830
proof that $\sqrt(2)$ is irrational / why is the fraction irreducible
10943
What is an example of a radical of sum of ideals not being equal to the sum of radicals?
70660
Why is $\sqrt{8}/2$ equal to $\sqrt{2}$?