Multiply the numerator and the denominator by the same number and you can change it to whatever number you need.
The same way as with a positive denominator. The difference is, you change the sign of the numerator.
To eliminate the radical in the denominator.
because of mathematical equivalence: it doesn't change the result
Yes. The original denominator and its conjugate will form the factors of a Difference of Two Squares (DOTS) and that will rationalise the denominator but only if the radicals are SQUARE roots.
1 is the only common denominator.
Can you change a denominator
The denominator will change for some operations and not for others.
No.
The same way as with a positive denominator. The difference is, you change the sign of the numerator.
No.
you divide the denominator by the numerator!
You divide the numerator by the denominator.
Divide the denominator into the numerator.
numerator
Divide the numerator by the denominator.
Divide the numerator by the denominator
by multiplying the denominator with the whole number and adding the numerator. the denominator will remain the same.