a-b=-8
ab
-12
Then what is the value of a square - b square
Answers
Answered by
0
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
Answered by
0
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
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