Answer:
5l² + 25ln
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
6.5m questions
8.6m answers