ninibadl12330 ninibadl12330

02-05-2020
Mathematics

contestada

Which of the following are solutions to the equation below?
Check all that apply
x2 - 8x + 16 = 5

Respuesta :

wegnerkolmp2741o wegnerkolmp2741o

02-05-2020

Answer:

x =4 ±sqrt(5)

Step-by-step explanation:

x2 - 8x + 16 = 5

Complete the square

(x-4)^2 = 5

Take the square root of each side

sqrt((x-4)^2) = ±sqrt(5)

x-4 = ±sqrt(5)

Add 4 to each side

x-4+4 =4 ±sqrt(5)

x =4 ±sqrt(5)

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