7x(x^2 + 9x - 11)
To simplify the expression 7x(x^2 + 9x - 11), we need to multiply 7x by each term inside the parentheses:
7x * x^2 = 7x^3
7x * 9x = 63x^2
7x * -11 = -77x
Putting it all together, the simplified expression is:
7x^3 + 63x^2 - 77x