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Roots Of x⁴+4x³-4x-13=0?

Nehal Wani , 16 Years ago

Grade

1 Answers

Jitender Singh

Ans:
Hello Student,
Please find answer to your question

$x^4 + 4x^3 - 4x - 13 = 0$
$x^4 + 4x^3 - 4x - 13 - 3 = -3$
$x^4 + 4x^3 - 4x - 16 = -3$
$x^3(x + 4) - 4(x + 4) = -3$
$(x^3 - 4)(x + 4) = -3$
$\Rightarrow x = -3.95, 1.512$
$\Rightarrow x = -0.78\pm 1.25i$

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