Question

simplify
(7abc+b^2)(7-bc)+c(2b^3-9ab)​

Answer 1

Step-by-step explanation:

$(7abc + {b}^{2} )(7 - bc) + c(2 {b}^{3} - 9ab) \\ 7abc(7 - bc) + {b}^{2} (7 - bc) + 2 {b}^{3} c - 9abc \\ 49abc - 7 {b}^{2} {c}^{2} + 7 {b}^{2} - {b}^{3 } c + 2 {b}^{3}c - 9abc \\ 40abc - 7 {b}^{2} c + 7 {b}^{2} + {b}^{3c}$