Respuesta :

Answer:

5l² + 25ln

Step-by-step explanation:

We require

4l(10n - 3m + 2l) - 3l(l - 4m + 5n) ← distribute both parenthesis

= 40ln - 12lm + 8l² - 3l² + 12lm - 15ln ← collect like terms

= 5l² + 25ln