(x^2-4x+6)(x^2+6x+6)-3x^2因式分解.急!

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(x^2-4x+6)(x^2+6x+6)-3x^2因式分解.急!

(x^2-4x+6)(x^2+6x+6)-3x^2因式分解.急!
(x^2-4x+6)(x^2+6x+6)-3x^2因式分解.急!

(x^2-4x+6)(x^2+6x+6)-3x^2因式分解.急!
原式=[(X^2+6)-4X][(X^2+6)+6x]-3x^2
=(x^2+6)^2+2X(X^2+6)-27X^2
=(x^2+6)^2+2X(X^2+6)+X^2-28X^2
=(X^2+6+X)^2-28X^2
=(X^2+X+2√7X+6)(X^2+X-2√7X+6)
数比较麻烦,题可能抄错了.

稍等

难!

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