We can expand and simplify x(x+7)(x-2) using the distributive property. The distributive property states that:
a(b + c) = ab + ac
In this case, we have:
x(x+7)(x-2) = x(x) + x(7) + x(x-2)
We can then simplify each term:
x(x) = x^2
x(7) = 7x
x(x-2) = x^2 - 2x
When we add these terms together, we get:
2 + 7x + x^2 - 2x = 2x^2 + 5x
And after simplifying, we get:
2x^2 + 5x