Question

If p+q=11 and pq=30. Find p²+q²

Answer 1

Answer:

p+q=11

pq=30

p^2 + q^2 = (p+q  )^2-2pq

                  ( 11 )^2 - 2 ( 30 )

                   121 -60  = 61

Step-by-step explanation:

Answer 2

Answer:

use basic formula

(a+b)²=a²+b²+2ab

answer is 61

Step-by-step explanation:

(p+q)²=p²+q²+2pq

from given information

p²+q²=(p+q)²-2pq

= 11²-(2×30)

=121-60

=61

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