Question

if p+q =9 and PQ =20 find (1) P²+q² ​

Answer 1

Answer:

p²+q²=41

Step-by-step explanation:

p+q=9

Squaring both sides

(p+q)²=9²

Using (a+b)²= a²+2ab+b²

p²+q²+2pq=81

p²+q²+2×20=81

p²+q²=81-40

p²+q²=41

Hope it helps you....