Question

if (a+b)=5 and ab=4 find the value of (a+b)²

Answer 1

Answer:

if the question's not wrong, the answer is 25. but if u need to find out a²+b² then the ans is 17

Step-by-step explanation:

(a+b)²=5²=25

(a+b)²=a²+b²+2ab

5²=a²+b²+2(4)

25=a²+b²+8

17=a²+b²

Answer 2

( a + b ) = 5

ab = 4

( a + b )2


( a + b )2 = a2 + b2 + 2 ab


(5)2 = a2 + b2 + 2x 4


25 = a2 + b2 + 8

25 - 8 = a2 + b2

17 = a2 + b2

( a+b )2 = a2 + b2 + 2ab

( a+b)2 = 17 + 2x4


(a+b)2 = 17 + 8

(a+b)2 = 25

(a+b) = 5