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OpenStudy (anonymous):
solve the equation 7x^2 + 6 = 13 ?
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OpenStudy (uri):
Subract 6 both sides 7x^2 + 6 = 13 -6 -6 ========== What do you get? @broderick365
OpenStudy (uri):
There...
OpenStudy (anonymous):
-7
OpenStudy (uri):
Why -7?
OpenStudy (uri):
13 the greater number has positive sign.. So, 7x^2=7
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OpenStudy (uri):
Now divide 7 with 7,what do you get?
OpenStudy (anonymous):
1
OpenStudy (uri):
Yes now the answer will be x=+1 -1
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