因式分解 ①(m+n)²-4(m+n)+4 ②x²(x-y)+(y-x)③(2xy²)三次方-(5xy²)·(-xy²)²④(a+3b)(a-2b)-(2a-b)²⑤已知:(x-2)^x²-4=1,求x的值⑥3x9^mx27^m=3^21,求(-
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![因式分解 ①(m+n)²-4(m+n)+4 ②x²(x-y)+(y-x)③(2xy²)三次方-(5xy²)·(-xy²)²④(a+3b)(a-2b)-(2a-b)²⑤已知:(x-2)^x²-4=1,求x的值⑥3x9^mx27^m=3^21,求(-](/uploads/image/z/1963765-37-5.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+%E2%91%A0%EF%BC%88m%2Bn%EF%BC%89%26%23178%3B-4%EF%BC%88m%2Bn%EF%BC%89%2B4+%E2%91%A1x%26%23178%3B%EF%BC%88x-y%EF%BC%89%2B%EF%BC%88y-x%EF%BC%89%E2%91%A2%EF%BC%882xy%26%23178%3B%EF%BC%89%E4%B8%89%E6%AC%A1%E6%96%B9-%EF%BC%885xy%26%23178%3B%EF%BC%89%C2%B7%EF%BC%88-xy%26%23178%3B%EF%BC%89%26%23178%3B%E2%91%A3%EF%BC%88a%2B3b%EF%BC%89%EF%BC%88a-2b%EF%BC%89-%EF%BC%882a-b%EF%BC%89%26%23178%3B%E2%91%A4%E5%B7%B2%E7%9F%A5%EF%BC%9A%EF%BC%88x-2%EF%BC%89%5Ex%26%23178%3B-4%3D1%2C%E6%B1%82x%E7%9A%84%E5%80%BC%E2%91%A53x9%5Emx27%5Em%3D3%5E21%2C%E6%B1%82%EF%BC%88-)
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因式分解 ①(m+n)²-4(m+n)+4 ②x²(x-y)+(y-x)③(2xy²)三次方-(5xy²)·(-xy²)²④(a+3b)(a-2b)-(2a-b)²⑤已知:(x-2)^x²-4=1,求x的值⑥3x9^mx27^m=3^21,求(-
因式分解 ①(m+n)²-4(m+n)+4 ②x²(x-y)+(y-x)
③(2xy²)三次方-(5xy²)·(-xy²)²
④(a+3b)(a-2b)-(2a-b)²
⑤已知:(x-2)^x²-4=1,求x的值
⑥3x9^mx27^m=3^21,求(-m²)^3除以(m^3·m²)的值
因式分解 ①(m+n)²-4(m+n)+4 ②x²(x-y)+(y-x)③(2xy²)三次方-(5xy²)·(-xy²)²④(a+3b)(a-2b)-(2a-b)²⑤已知:(x-2)^x²-4=1,求x的值⑥3x9^mx27^m=3^21,求(-