Question

.If 3p - 7q = 10 and pq = -1 then, find the value of 9p² + 49q² is

Answer 1

Answer:

3p-7q=10

p = 10/3 +7q/3

pq= -1

q ( 10/3 + 7q/3 ) = -1

7q^2 + 10q + 3 = 0

q = -1 , q = 7/3

p = 1

9p^2 + 49q^2

9× 1^2 + 49× -1 ^2

9+ 49

58 ans ..