Which of the following expressions CANNOT have a negative value?
a)|a + b| - |a - b|
b)|a + b| - |a|
c)|2a + b| - |a + b|
d)a^2 + b^2 - 2|ab|
e)|a^3 + b^3| - a - b
Is there any another solution apart from putting numbers. It is time consuming in this case.
a)|a + b| - |a - b|
b)|a + b| - |a|
c)|2a + b| - |a + b|
d)a^2 + b^2 - 2|ab|
e)|a^3 + b^3| - a - b
Is there any another solution apart from putting numbers. It is time consuming in this case.
