因式分解4-(2x-1)² (2m-n)²-121(m+n)²因式分解①4-(2x-1)² ②(2m-n)²-121(m+n)²

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因式分解4-(2x-1)² (2m-n)²-121(m+n)²因式分解①4-(2x-1)² ②(2m-n)²-121(m+n)²

因式分解4-(2x-1)² (2m-n)²-121(m+n)²因式分解①4-(2x-1)² ②(2m-n)²-121(m+n)²
因式分解4-(2x-1)² (2m-n)²-121(m+n)²
因式分解①4-(2x-1)² ②(2m-n)²-121(m+n)²

因式分解4-(2x-1)² (2m-n)²-121(m+n)²因式分解①4-(2x-1)² ②(2m-n)²-121(m+n)²
4-(2x-1)²
=[2+(2x-1)][2-(2x-1)]
=(2x+1)(1-2x)
(2m-n)²-121(m+n)²
=[(2m-n)+11(m+n)][(2m-n)-11(m+n)]
=(13m+9n)(-9m-12n)
=-3(13m+9n)(3m+4n)


4-(2x-1)²
=2²-(2x-1)²
=(2+2x-1)(2-2x+1)
=(2x+1)(3-2x)
(2m-n)²-121(m+n)²
=(2m-n)²-11²(m+n)²
=[(2m-n)-11(m+n)][(2m-n)+11(m+n)]
=[-9m-12n][13m+10n]
=-[9m+12n][13m+10n]