state gov DSSSB Junior Assistant, Steno and LDC Mock Test 2023 - 24 Quantitative Aptitude Algebra Identities
What is the value of (a2 + b2 + 4c2 - ab - 2bc - 2ca)(a + b +2c)?
1
a3+ b3 + 8c3 - 8abc
2
a3 + b3 + 6c3 - 4abc
3
4a3 + b3 + 8c3 - 9abc
4
a3 + b3 + 8c3 - 6abc