anonymous
  • anonymous
im really confused and tired can someone help me?Estimate the roots of the equation by graphing. Round to the nearest tenth and write in set form, such as {-1.2,3.4}. x2 - 6= 0
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
how do i solve that?
ParthKohli
  • ParthKohli
add 6 to both sides, take the square root.
anonymous
  • anonymous
x^2=6?

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ParthKohli
  • ParthKohli
Yes, now what are the square roots of 6?
anonymous
  • anonymous
2.44948974278
ParthKohli
  • ParthKohli
Now round to the nearest tenth
anonymous
  • anonymous
2.4
ParthKohli
  • ParthKohli
Note that there is a negative sqrt too.
mathstudent55
  • mathstudent55
An equation of the form x^2 = a, a > 0 has two roots: x = sqrt(b) and x = -sqrt(b) Since you have x^2 = 6, just find the square root of 6. Then one root is the positive square root of 6 and the other root is the negative square root of 6.
anonymous
  • anonymous
2.4,-2.4
ParthKohli
  • ParthKohli
that is right!
anonymous
  • anonymous
thats the answer?
ParthKohli
  • ParthKohli
Yes.
Koikkara
  • Koikkara
well.....is it 3??|dw:1361077277418:dw|
mathstudent55
  • mathstudent55
Write in a set: {-2.4, 2.4}
anonymous
  • anonymous
thank you so much my brain is shutting down bcs im tired
ParthKohli
  • ParthKohli
no problem :-)
anonymous
  • anonymous
:D
Koikkara
  • Koikkara
well, ....u guys r great...

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