Question

if p+q=10 and pq=21,find 3(p²+q²)​

Answer 1

Answer:

p+q=10

squaring both side

(p+q)²= (10)²

p²+2pq+q²=100

p²+2(21) +q²=100

p²+24+q²=100

p²+q²=100-24

p²+q²=76

3(p²+q²) = 3(76)

= 228

Answer 2

Answer:

write the question nicly it’s hard to know