If a - b = 5 and
a2 + b2 = 493,
then the value of ab is:
Answer & explanation
Correct answer: option 1
Given,
a - b = 5
a2 + b2 = 493
( a - b )2 = a2 + b2 - 2ab
25 = 493 - 2ab
ab = 234
If a - b = 5 and
a2 + b2 = 493,
then the value of ab is:
Correct answer: option 1
Given,
a - b = 5
a2 + b2 = 493
( a - b )2 = a2 + b2 - 2ab
25 = 493 - 2ab
ab = 234