(2c-5)(6c+5)
Expanding the expression (2c-5)(6c+5) using the distributive property:
= 2c(6c) + 2c(5) - 5(6c) - 5(5)
= 12c^2 + 10c - 30c - 25
= 12c^2 - 20c - 25
Therefore, (2c-5)(6c+5) simplifies to 12c^2 - 20c - 25.
= 2c(6c) + 2c(5) - 5(6c) - 5(5)
= 12c^2 + 10c - 30c - 25
= 12c^2 - 20c - 25
Therefore, (2c-5)(6c+5) simplifies to 12c^2 - 20c - 25.