tatig1422 tatig1422

09-03-2022
Mathematics

contestada

I need help with my khan academy, I don't understand anything and it's hard to do my work..

I need help with my khan academy I dont understand anything and its hard to do my work class=

Respuesta :

jimrgrant1 jimrgrant1

09-03-2022

Answer:

(x - 7)² = 9

Step-by-step explanation:

x² - 14x + 40 = 0 ( subtract 40 from both sides )

x² - 14x = - 40

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 7)x + 49 = - 40 + 49

(x - 7)² = 9

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