What is the factored form of x^2 − 10x + 21?

(x - 7)(x - 3)

Step-by-step explanation:

Given

x² - 10x + 21

Consider the factors of the constant term (+ 21) which sum to give the coefficient of the x- term (- 10)

The factors are - 7 and - 3, since

- 7 × - 3 = + 21 and - 7 - 3 = - 10 , thus

x² - 10x + 21 = (x - 7)(x - 3)

dd

step-by-step explanation:

dd

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11