(1)(25+2h)(2h+2h)=888 (2) (100-2x)(90-x)=8448
问题描述:
(1)(25+2h)(2h+2h)=888 (2) (100-2x)(90-x)=8448
答
(1)(25+2h)(2h+2h)=888
展开并化简,得:2h²+25h-222=0
分解因式法: (2h-3)(h-6)=0
答案:h=2/3或h=6
(2) (100-2x)(90-x)=8448
展开并化简,得:x²-140x+276=0=0
分解因式法: (x-2)(x-138)=0
答案:x=2或x=138