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im8cl6eeMNgenia
im8cl6eeMNgenia im8cl6eeMNgenia
  • 20-07-2016
  • Mathematics
Answered

which are the solutions of x2 = –7x – 8?

Verified Answer :

apologiabiology
apologiabiology apologiabiology
  • 20-07-2016

add 7x+8 to both sides
x^2+7x+8=0
use quadracit formula
x=\(\frac{-b+/- \sqrt{b^2-4ac} }{2a}\)
a=1
b=7
c=8


x=\(\frac{-7+/- \sqrt{7^2-4(1)(8)} }{2(1)}\)
x=\(\frac{-7+/- \sqrt{49-32} }{2}\)
x=\(\frac{-7+/- \sqrt{17} }{2}\)
aprox
x=-5.56155 or -1.438

Answer Link
zoeyret1234 zoeyret1234
  • 15-01-2019

Answer:

the answer is C

Step-by-step explanation:


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