prove that t²-3 is a factor of 2t⁴+3t³-2t²-9t-12
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Answer:
t^2-3=0
t^2=3
t=√3
2×(√3)^4+3×(√3)^3-2×(√3)^2-9×√3-12
2×9+3×3×√3-6-9×√3-12
18+9√3-18-9√3
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then it is factor of this polynomials
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