Respuesta :

x² - 10x + 25

Explanation:

(x - 5)² = (x -5)(x -5)

Simplifying the expression:

x(x -5) -5(x - 5)

x(x) -x(5) -5(x) -5(-5)

Multiplication of same sign gives positive number. Multiplication of opposite signs give negative number.

x²- 5x - 5x + 25

collect like terms:

x² - 10x + 25