Question

using factor theorem show that x+2 is a factor of x^4-x^2-12​

Answer 1

Answer:

Yes it is a factor..

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Answer 2

Answer:

$x + 2 = 0 \\ x = 0 - 2 \\ x = \: - 2 \\ \\ put \: x \: = \: - 2 \\ = ( - 2) {}^{4} - ( - 2) {}^{2} - 12 \\ = 16 + 4 - 12 \\ \ \\ 12 - 12 \\ = 0$

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