X四次方-2(a²+b²)X²+(a²-b²)²
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X四次方-2(a²+b²)X²+(a²-b²)²
x^4-2(a²+b²)X²+(a²-b²)²
=x^4-(2a²+2b²)x²+(a-b)²(a+b)²
=[x²-(a-b)²][x²-(a+b)²]
=(x-a+b)(x+a-b)(x-a-b)(x+a+b)
X四次方-2(a²+b²)X²+(a²-b²)²
x^4-2(a²+b²)X²+(a²-b²)²
=x^4-(2a²+2b²)x²+(a-b)²(a+b)²
=[x²-(a-b)²][x²-(a+b)²]
=(x-a+b)(x+a-b)(x-a-b)(x+a+b)