togoodtobetrue4u Group Title I need help with this problem. If a * b = a2 -b 2. Find 3 * 2. ________ a + b one year ago one year ago

1. togoodtobetrue4u Group Title

I' m attaching a file with 5 choices for this problem.

2. jim_thompson5910 Group Title

Hint: $\Large a * b = \frac{a^2-b^2}{a+b}$ $\Large 3 * 2 = \frac{3^2-2^2}{3+2}$

3. togoodtobetrue4u Group Title

so it would be -2

4. jim_thompson5910 Group Title

not quite

5. togoodtobetrue4u Group Title

2 then

6. jim_thompson5910 Group Title

$\Large 3 * 2 = \frac{3^2-2^2}{3+2}$ $\Large 3 * 2 = \frac{9-4}{3+2}$ $\Large 3 * 2 = \frac{5}{5}$ $\Large 3 * 2 = 1$