(a + b) (a - b) =?
Need answer quickly!!

(a + b) \: (a - b) = {a}^{2} - {b}^{2}

Step-by-step explanation:

this is an algebric identity ,

where,

it's derivation,

=》

=》

=》

because , + ab and -ab cancel out

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

hope this .