Question

If p+q=7 and pq=1, find the following (a)p²-q² please tell me correct answer​

Answer 1

p+q=7...........1

and pq=1

(p+q)² - (p-q)² = 4pq

7² -(p-q)² = 4× 1

49 -(p-q)² = 4

45 = (p-q)²

p-q = √45

p-q = 6.7 ...........2

form eq ¹ and eq²

2p = 13.7

p= 13.7/2

p= 6.85

put p for q

6.85 + q = 7

q = 7-6.85

q= 0.15

(a)p²-q² = 6.85² - 0.15²

= 46.92- 0.0225 = 46.695

Answer 2

Answer:

47 is the answer

Step-by-step explanation:

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