Can you change a denominator
The denominator will change for some operations and not for others.
Multiply the numerator and the denominator by the same number and you can change it to whatever number you need.
Ah, math time, my favorite! To reduce the fraction w^2 + 5w + 6 over w^2 - w - 12, first factor both the numerator and the denominator. The numerator factors into (w + 2)(w + 3), and the denominator factors into (w + 3)(w - 4). Cancel out the common factor of (w + 3) in both the numerator and the denominator, leaving you with (w + 2) over (w - 4). Voilà!
The answer depends on what w represents. If w is the denominator of the rational function then as w gets close to zero, the rational function tends toward plus or minus infinity - depending on the signs of the dominant terms in the numerator and denominator.
No.
The same way as with a positive denominator. The difference is, you change the sign of the numerator.
No.
When you divide 2w by w, you are essentially dividing 2 multiplied by w by w. This simplifies to 2 because one of the w's in the numerator cancels out with the w in the denominator. Therefore, the result of 2w divided by w is 2.
You divide the numerator by the denominator.
Divide the numerator by the denominator.
you divide the denominator by the numerator!
Divide the denominator into the numerator.