If a + b = 1, then a4 + b4 - a3 - b3 - 2a2b2 + ab is equal to:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 0
a + b = 1
Let a = 0, b = 1
Putting the value in equation
a4 + b4 - a3 - b3 - 2a2b2 + ab
= 0 + 1 - 0 - 1 - 0 + 0 = 0