Question

(a+b) raised power 9​

Answer 1

${(a + b)}^{9} = {a}^{9} + 9a {}^{8} b+ 36 {a}^{7} b + 84 {a}^{6} y {}^{3} + 126 {a}^{5} {b}^{4} + 84 {a}^{3} b {}^{6} + 36 {a}^{2} {b}^{7} + {9ab}^{8} + b {}^{9}$