Question

if a+b=5 and ab=2, find the value of (a+b)²​

Answer 1

Explanation:

(a+b)²=a²+b²+2ab

(5)² =a²+b²+2(2)

25 = a²+b²+4

a²+b²=25-4

a²+b² =21

the value of (a+b)²=(5)²=⟩25

Answer 2

Answer:

(a+b)*=a*+2ab+b*

5×5=a*+b*+2×2

25=a*+b*+4

25-4=a*+b*

21=a*+b*

(a+b)*=5×5=25