Question

упростите выражение: (a+b)^2-(a-b)^2

Answer 1

(a+b)^2-(a-b)^2 = a²+2ab+b²-a²+2ab-b²= 4ab

Answer 2

спасибо

Answer 3

$(a+b)^{2} - (a-b)^{2} = a^{2} +2ab+ b^{2} -( a^{2} -2ab+ b^{2} )=$$a^{2} +2ab+ b^{2} - a^{2} +2ab- b^{2} =4ab$