1. If a + b = 6 and ab = 8, evaluate (i) a2 + b2 and (ii) a-b.
2. If a - b = 7 and ab = 8, evaluate (i) a2 + b2 and (ii) a+b.
3. (a) If p2 +q2 = 252 and p+q=16, evaluate pq.
(b) If x2 + y2 = 51 and x - y = 7, evaluate xy.
4.Find the value of ab when a + b = 10 and a - b = 6.
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Answered by
8
Answer:
A^2+B^2=(A+B)^2-2AB=(6)^2-2X8=16......
Answered by
6
Answer:1.a2+b2:20,
2.a2+b2:65,
3.
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