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OpenStudy (anonymous):
Is x3 + x5 = x8? EXPLAIN your answer.
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OpenStudy (unklerhaukus):
\[x^3 + x^5 = x^8\]?
OpenStudy (anonymous):
Mhm,
OpenStudy (lgbasallote):
Hint!!!
\[\huge a^m \times a^n = a^{m+n}\]
\[\huge a^m + a^n \ne a^{m+n}\]
OpenStudy (unklerhaukus):
\[x^3 + x^5 = x^8\]
factorize out x^3
\[x^3(1 + x^2) = x^3(x^5)\]
and cancel
\[\cancel{x^3}(1 + x^2) = \cancel{x^3}(x^5)\]\[\qquad1 + x^2 = x^5\]
OpenStudy (unklerhaukus):
\[1+x^2=x^5\]take all terms to one side
\[1+x^2-x^5=0\]
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OpenStudy (anonymous):
Its eithers yes or no, Then explain why or why not
OpenStudy (unklerhaukus):
are there any solutions for x?
OpenStudy (anonymous):
ummmmm is the question above correct,yes or no?
OpenStudy (unklerhaukus):
is
\[1+x^2−x^5=0\]
true for x=1 for example?
OpenStudy (anonymous):
yeah thats easy
AF your just combinding like terms
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OpenStudy (anonymous):
so its correct @Suppa_Koopa_Troopa
OpenStudy (unklerhaukus):
as it turns out there are 5 solutions, four of them are complex,
and one is real but irrational ,
in general \[x^3+x^5\neq x^8\]
OpenStudy (anonymous):
from the way i see it yeah unless its some parallel universe question lol .
OpenStudy (unklerhaukus):
\[1.194^3+1.194^5 \approx 1.194^8\]
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