Question

(a+b)(a^2-ab+b^2)-(a-b)(a^2+ab+b^2)=2b^3

Answer 1

\(\left(a+b\right)\left(a^2-ab+b^2\right)-\left(a-b\right)\left(a^2+ab+b^2\right)=\left(a^3+b^3\right)-\left(a^3-b^3\right)=2b^3\left(đpcm\right)\)

tik mik nha

Answer 2

giúp vs mn ơi

 

Answer 3

\(\left(a+b\right)\left(a^2-ab+b^2\right)-\left(a-b\right)\left(a^2+ab+b^2\right)\)

\(=a^3+b^3-a^3+b^3\)

\(=2b^3\)

Answer 4

VT= (a+b)(a² - ab+b²) - (a-b)(a²+ab+b²)

     = a³ + b³ - a³+b³=2b³ = VP

Answer 5

(a+b)(a^2−ab+b^2)−(a−b)(a^2+ab+b^2)=(a^3+b^3)−(a^3−b^3)=2b^3

=(a+b)(a^2−ab+b^2)−(a−b)(a^2+ab+b^2)=(a^3+b^3)−(a^3−b^3)=2b^3(đpcm)

tick ik bạn