Ten subtracted from the sum of a number and twice the square of the number

Answer: 2x² + x - 10

Step-by-step explanation:

Let x represent the unknown number.

10 subtracted from means " - 10"

twice the square means "2x²"

sum means "+" (add)

Now, put them together to get:

10 subtracted from sum of x and 2x² - -> 2x² + x - 10