来自江秀明的问题
m^2-6m+8分解因式用添项,拆项法做!有个例子:x^2+2ax-3a^2=x^2+2ax+a^2-a^2-3a^2=(x+a)^2-(2a)^2=(x+3a)(x-3a)
m^2-6m+8分解因式用添项,拆项法做!有个例子:x^2+2ax-3a^2=x^2+2ax+a^2-a^2-3a^2=(x+a)^2-(2a)^2=(x+3a)(x-3a)
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2020-03-24 21:58