Find the equation for the roots 7 and -2.

(x - 7) (x + 2)

Step-by-step explanation:

Create equation-

(x - 7) (x + 2)

Multiply-

Take the term multiply it with each variable or number and add with the product of the second term multiplied with the variable and number, as so:

x * x = x^2

x * 2 = 2x

-7 * x = -7x

-7 * 2 = -14

x^2 + 2x -7x - 14

Combine like terms

x^2 -5x - 14

To confirm

-14

-7 and 2 go into -14 and add to -5

x + 107

step-by-step explanation:

let's say that the number he had before the mistake was x. then, he will have 107 dollars more than this, so the answer is x + 107.

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