factorize x⁴-30x²+161
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factorize x⁴-30x²+161
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(x²-23)(x²-7)
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Answer:
x⁴-30x²+161
=x⁴-23x²-7x²+161
=x²(x²-23)-7(x²-23)
=(x²-7)(x²-23)
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