Question

derivation oy (a+b)3​

Answer 1

$(a + b) {}^{3} = (a + b) {}^{2} (a + b)$

we know that

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

then

$(a + b) {}^{3} = (a {}^{2} + 2ab + b {}^{2} )(a + b)$

$(a + b) {}^{3} = a {}^{3} + b {}^{3} + 2ab {}^{2} + a {}^{2} b + ab {}^{2} + 2ab {}^{2}$

on rearranging terms :

$(a + b) {}^{3} = a {}^{3} + b {}^{3} + 3ab(a + b)$

I hope it help you ✌️✌️❤️. mark answer as brainlist

Answer 2

Functionally, the respiratory system is separated into a conducting zone andrespiratory zone. The conducting zoneconsists of the nose, pharynx, larynx, trachea, bronchi, and bronchioles. These structures form a continuous passageway for air to move in and out of the lungs.