-4x²+(2x-3y)²运用平方差公式分解因式①-4x²+(2x-3y)²②16(a+b)²-9(a-b)²③9m²(a-b)^3+49(b-a)^3④(x+y-z)²-(x-y+z)²⑤(a²-b²)+(3a+3b)⑥x^4-1
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