CommanderDewott CommanderDewott

15-06-2020
Mathematics

contestada

Solve by completing the square. w2 − 8w − 39 = 0 Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth. w = [ ] or w = [ ]

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mhanifa mhanifa

15-06-2020

Answer:

4+√55= 11.42

4-√55= -3.42

Step-by-step explanation:

w² − 8w − 39 = 0
w²- 2*4w + 16- 55=0
(w-4)²=55
w-4=√55 ⇒ w= 4+√55= 11.42
w-4=- √55 ⇒ w= 4-√55= -3.42

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