Question

a-b=-8
ab
-12
Then what is the value of a square - b square​

Answer 1

Answer:

64

Step-by-step explanation:

then a=alpha and b= bita

alpha+bita= -b/ a

so b=8

then (-b)square =(-8)square

64

is answer

Answer 2

Answer:

-32

Step-by-step explanation:

Given :

a - b = -8

ab = -12

To Find :

a² - b²

Formula Used :

(a-b)² = a² + b² - 2ab

(a+b)² = a² + b² + 2ab

(a+b)(a-b) = a² - b²

Solution :

(a-b)² = a² + b² - 2ab

=> (-8)² = a² + b² - 2×-12

=> 64 = a² + b² + 24

=> a² + b² = 64-24

=> a² + b² = 40

(a+b)² = a² + b² + 2ab

=> (a+b)² = 40 + 2×-12

=> (a+b)² = 40 - 24

=> (a+b)² = 16

=> (a+b) = √16

=> (a+b) = 4

(a+b)(a-b) = a² - b²

=> a² - b² = 4 × -8

=> a² - b² = -32