I'm just confused about a couple of rules. For example if I have multiplied a fraction out to get 9(x+4)-2(x+2) does the 2 in the second bracket get multiplied by -2 or 2?
Also if I have this: 2(x+4)(x+2) is it only the x+4 which is doubled? Or do you work out the quadratic and multiply the whole thing by two?
1. Domain: The denominator must be unequal to zero. Therefore
2. The common denominator of the fractions is . Change the fractions so they have both the same denominator:
3. Multiply both sides of the equation by the common denominator to get rid of the fractions:
4. Expand all brackets:
5. Collect like terms:
6. Divide by the leading factor of x: