To simplify the expression -4a(-5a^2 + 2a - 1), we first distribute the -4a to each term inside the parentheses:
-4a(-5a^2) + (-4a)(2a) + (-4a)(-1)= 20a^3 - 8a^2 + 4a
Therefore, -4a(-5a^2 + 2a - 1) simplifies to 20a^3 - 8a^2 + 4a.
To simplify the expression -4a(-5a^2 + 2a - 1), we first distribute the -4a to each term inside the parentheses:
-4a(-5a^2) + (-4a)(2a) + (-4a)(-1)
= 20a^3 - 8a^2 + 4a
Therefore, -4a(-5a^2 + 2a - 1) simplifies to 20a^3 - 8a^2 + 4a.