把3x^2+12xy+11y^2因式分解
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把3x^2+12xy+11y^2因式分解
![把3x^2+12xy+11y^2因式分解](/uploads/image/z/19304975-47-5.jpg?t=%E6%8A%8A3x%5E2%2B12xy%2B11y%5E2%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3)
3x^2+12xy+11y^2
=3x^2+12xy+12y^2-y^2
=3(x+2y)^2-y^2
=[a(x+2y)+y][a(x+2y)-y]
a=根号3
=3x^2+12xy+12y^2-y^2
=3(x+2y)^2-y^2
=[a(x+2y)+y][a(x+2y)-y]
a=根号3