Question

If a − b = 2, ab = 15, find: (i) a + b (ii) a 3 − b 3

Answer 1

Aɴsᴡᴇʀ :-

Qᴜᴇsᴛɪᴏɴ :-

If a − b = 2, ab = 15, find

• a + b
• a 3 − b 3

Aɴsᴡᴇʀ:-

1 × 15 = 15

3 × 5 = 15 ✓

5 × 3 = 15

5 × 3 = 15

• 5 × - 3