Question

4) Multiply the following:

(5m +7) (3m-8m+9)​

Answer 1

Answer:

$15 {m}^{3} - 19 {m}^{2} - 11m + 63$

Step-by-step explanation:

$(5m + 7)( {3m}^{2} - 8m + 9) \\ \\ = 5m( {3m}^{2} - 8m + 9) + 7( {3m}^{2} - 8m + 9) \\ \\ = 15 {m}^{3} - 40 {m}^{2} + 45m + 21 {m}^{2} - 56m + 63 \\ \\ = 15 {m}^{3} - 40 {m}^{2} + 21 {m}^{2} + 45m - 56m + 63 \\ \\ = 15 {m}^{3} - 19 {m}^{2} - 11m + 63$

HOPE IT HELPS YOU !

THANKS !

Answer 2

Answer:

15m^2 +40m^2 +45m + 21m + 56m +63

55m^2 + 122m + 63