Answer:
10x^2 - 11x -6
Explanation:
1/ First, distribute the brackets:
( multiply 5x to the other bracket, then 2 multiply it also to the other bracket)
After the distribution you'll get this:
10x^2 - 15x + 4x - 6
2/ finally, to simplify you'll have to combine the like terms:
( as you can see the only like terms we have are -15x and +4x)
combine them and you'll get:
10x^2 - 11x -6 ( this is the final answer)