If a - b = 2 and
a2 + b2 = 34,
then the value of ab is:
Answer & explanation
Correct answer: option 2
Given,
a - b = 2
a2 + b2 = 34
( a - b )2 = a2 + b2 - 2ab
4 = 34 - 2ab
ab = 15
If a - b = 2 and
a2 + b2 = 34,
then the value of ab is:
Correct answer: option 2
Given,
a - b = 2
a2 + b2 = 34
( a - b )2 = a2 + b2 - 2ab
4 = 34 - 2ab
ab = 15