Question

expandsion:(a+b-3)^3​

Answer 1

Answer:

${((a + b )- (3))}^{3} \\ = {(a + b)}^{3} - {(3)}^{3} - 3 \times {(a + b)}^{2} \times 3 + 3 \times (a + b) \times {(3)}^{2} \\ = {a}^{3} + {b}^{3} + 3 {a}^{2} b + 3a {b}^{2} - 27 - 9( {a}^{2} + {b}^{2} + 2ab) + 27a + 27b \\ = {a}^{3} + {b}^{3} + 3 {a}^{2} b + 3a {b}^{2} - 27 -9 {a}^{2} - 9{b}^{2} - 18ab+ 27a + 27b \\ = {a}^{3} + {b}^{3} -9 {a}^{2} - 9{b}^{2} + 3 {a}^{2} b + 3a {b}^{2} + 27a + 27b- 18ab - 27 \\ \\ \red{\mathfrak{ \large{\underline{{Hope \: It \: Helps \: You}}}}} \\ \blue{\mathfrak{ \large{\underline{{Mark \: Me \: Brainliest}}}}}$