Answer:
The first option
Step-by-step explanation:
First, multiply the fractions in the parentheses. To do this, multiply the numerators (3 * 4) and the denominators (4 * 9)
You get the fraction 12/36, which you can simplify as 1/3.
Now add -1/2 to 1/3.
First, find a common denominator. If you multiply 2 by 3, you get 6. Multiply the numerators by the same number you multiply the denominators by. In -1/2, you multiply 2 by 3 to get 6. So multiply -1 by 3 as well. You get -3/6.
Do the same with 1/3. To get the denominator of 6, you multiplied by 2, so do the same to the top. You get 2/6.
Now just add -3/6 + 2/6 (or subtract 3/6 from 2/6). You get -1/6, so it's the first option.
