brainbreaker brainbreaker

11-10-2020
Mathematics

contestada

If the equation 2x

2 – 8x – 42 = 0 is solved by factoring, what is its positive
solution set?
A. {-3} B. {5} C. {6} D. {7}

Respuesta :

jaineelsampat jaineelsampat

11-10-2020

Answer:

B.{5}

Step-by-step explanation:

2-8x-42=0

(÷2), we get,

1-4x-21=0

-4x-20=0

-4x=20

x=20÷(-4)

x=(-5)

since the question asks for a positive set, the answer is [x=5]

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