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分解因式4x^4-13X^2+9怎么解,
人气:134 ℃ 时间:2020-06-03 23:10:45
解答
4x^4-13X^2+9
=(4x^4-4x^2)-(9x^2-9)
=4x^2(x^2-1)-9(x^2-1)
=(x^2-1)(4x^2-9)
=(x+1)(x-1)(2x+3)(2x-3)
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