diamond6052 diamond6052

21-12-2020
Mathematics

contestada

B is the midpoint of, AB = x² + 2x + 25 and BC = 40. What are the values of x?

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Yang100 Yang100

21-12-2020

Answer:

x=3, -5.

Step-by-step explanation:

x^2+2x+25=40

x^2+2x+25-40=0

x^2+2x-15=0

factor out the trinomial,

(x-3)(x+5)=0

zero property,

x-3=0, x+5=0,

x=0+3=3,

x=0-5=-5.

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