Question

if a² + b² =74 and ab =35,then (a-b)
A. 39
B. 4
C. 70
D. 2​

Answer 1

Answer:

D. 2

Step-by-step explanation:

Using (a - b)^2 formula -

We know that (a - b)^2 = a^2 + b^2 - 2ab

Given, a^2 + b^2 = 74

ab = 35

On substitution, we get -

(a - b)^2 = 74 -2(35)

(a - b) = √(74-70)

a - b = √4

a - b = 2

D. 2

Answer 2

Answer:

D)2

Step-by-step explanation:

AS WE KNOW (a - b)²=a²+b²-2ab

GIVEN a²+b²=74,ab=35

substitute values in the formula

(a-b)²=74-2(35)

(a-b)² =74-70

(a-b)²=4

(a-b) =√4

therefore (a-b) =2

Hope u understand...