因式分解(x²+4)²-(2x+3)² 99²+99分之99²+199 4a²b²-（2x+3）²

因式分解(x²+4)²-(2x+3)² 99²+99分之99²+199 4a²b²-（2x+3）²
因式分解(x²+4)²-(2x+3)² 99²+99分之99²+199 4a²b²-（2x+3）²

因式分解(x²+4)²-(2x+3)² 99²+99分之99²+199 4a²b²-（2x+3）²
(x²+4)²-(2x+3)²
=(x²+4+2x+3)(x²+4-2x-3)
=(x²+2x+7)(x²-2x+1)
=(x²+2x+7)(x-1)²
(99²+199)/(99²+99)
=(99²+2×99+1)/(99²+99)
=(99+1)²/[99×)99+1)]
=(99+1)*99
=99分之100
4a²b²-（2x+3）²
=(2ab+2x+3)(2ab-2x-3)

(x²+4)²-(2x+3)²
=(x²+4-2x-3)(x²+4+2x+3)
=(x²-2x+1)(x²+2x+7)
=(x-1)²(x²+2x+7)
99²+99分之99²+199
=99²+99+199
=99×(1+99)+199
=99×100+199
=9900+199
=10099
4a²b²-（2x+3）²
=(2ab-2x-3)(2ab+2x+3)

(x²+4)²-(2x+3)²
=(x^2+4+2x+3)(x^2+4-2x-3)
=(x^2+2x+7)(x^2-2x+1)
=(x-1)^2·(x²+2x+7)
(99^2+199)/(99^2+99)
=(99^2+198+1)/99(99+1)
=(99+1)^2/99(99+1)
=(99+1)/99
=100/99
4a²b²-（2x+3）²
=(2ab)^2-(2x+3)^2
=(2ab+2x+3)(2ab-2x-3)