Question

a-b pra a=3 E b= -1/2

Answer 1

$a-b= \\ \\ se~~a=3~~~~~b=- \frac{1}{2} \\ \\ 3-(- \frac{1}{2} )=3+ \frac{1}{2} = \\ \\ mmc=2 \\ \\ \frac{6+1}{2} = \frac{7}{2}$