Question

(3a²+1)—(4+2a²)
do you know the answer

Answer 1

collect the like terms calculate

a2-3

Answer 2

Remark

The key to this one is just to remove the brackets. Be very careful with the right hand bracket.

Remove the brackets.

3a^2 + 1 - 4 - 2a^2 Notice the minus sign affects both the 4 and the 2a^2

3a^2 - 2a^2 = a^2

+ 1 - 4 = - 3

Answer

a^2 - 3