Question

Subtract:- (a²+b² -2ab) from (a²+b² +2ab)​

Answer 1

Answer:

- 4ab

Step-by-step explanation:

You remove unnecessary parentheses (that is the first one) so you got:

a² + b² - 2ab - (a² + b² + 2ab)

When there is a - (minus) in front of an expression in parenthese, change the sign of each term in the expression

a²+b²-2ab - a²-b²-2ab

And since two opposites add up to zero, we remove all the same values from the expression (a² and b²) so we are left with:

-2ab - 2ab

and now we just calculate the difference and that is:

- 4ab