Question

17. If p +9=12 and pq = 22, then find p^2+q^2.
(a) 105
(b) 100 (c) 107
(d) 109​

Answer 1

Question:

17. If p +9=12 and pq = 22, then find p^2+q^2.

(a) 105

(b) 100

(c) 107

(d) 109​

Answer:

b.) 100

Explanation:

p + q = 12

pq = 22

p² + q² = (p+q)²- 2pq

        = (12)² - 2 × 22

       = 144 × 44

         = 100

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