Respuesta :

mhanifa

Answer:

  • See below

Step-by-step explanation:

  • y² - 10y + 30 =
  • y² - 10y + 25 + 5 =
  • (y - 5)² + 5

Since (y - 5)² ≥ 0, the expression above is positve:

  • (y - 5)² + 5 ≥ 5

Let's factor out

  • y²-10y+30
  • y²-2(y)(5)+25+5
  • (y-5)²+5

(y-5)² has least value as 0

Least value of expression is 0+5=5

It's positive no

Otras preguntas