EmmaH
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
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EmmaH
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how do i solve that?
ParthKohli
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add 6 to both sides, take the square root.
EmmaH
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x^2=6?
ParthKohli
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Yes, now what are the square roots of 6?
EmmaH
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2.44948974278
ParthKohli
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Now round to the nearest tenth
EmmaH
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2.4
ParthKohli
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Note that there is a negative sqrt too.
mathstudent55
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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.
EmmaH
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2.4,-2.4
ParthKohli
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that is right!
EmmaH
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thats the answer?
ParthKohli
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Yes.
Koikkara
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well.....is it 3??|dw:1361077277418:dw|
mathstudent55
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Write in a set:
{-2.4, 2.4}
EmmaH
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thank you so much my brain is shutting down bcs im tired
ParthKohli
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no problem :-)
EmmaH
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:D
Koikkara
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well, ....u guys r great...