Question

Q )) a-b=4 and the ab=45 then what is the value of a+b=?​

Answer 1

14

Step-by-step explanation:

a = 9

b = 5

a - b = 4 . so, 9 -5 = 4

a x b = 45 . so, 9 x 5 = 45

a + b = ?

9 +5 = 14

so, the answer is 14

Answer 2

Answer:4

Step-by-step explanation:

(a-b)²=a²+b²-2ab

(4)²=a²+b²-2(45)

16=a²+b²-90

a²+b²=-90+16

a²+b²=-74

(a+b)²=a²+b²+2ab

(a+b)2 =-74+2(45)

(a+b)2=16

a+b=square root of 16

a+b=4