x4+7x3+14x2+7x+1
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x4+7x3+14x2+7x+1x4+7x3+14x2+7x+1x4+7x3+14x2+7x+1原式=x^4+2x^2+1+7x^3+7x-2x^2+14x^2=(x^2+1)^2+7x(x^2+1)
x4+7x3+14x2+7x+1
x4+7x3+14x2+7x+1
x4+7x3+14x2+7x+1
原式=x^4 +2x^2+1+ 7x^3 +7x -2x^2+14x^2
=(x^2+1)^2+7x(x^2+1)+12x^2
=(x^2+1+3x)(x^2+1+4x)
=(x^2 +3x+1)(x^2+4x+1)
因式分解:x4+7x3+14x2+7x+1
x4+7x3+14x2+7x+1
(1)x4-12x+323(2)x4+7x3+14x2+7x+1
谁会因式分解呀 1.x4-12x+3232.x4+7x3+14x2+7x+13.x4-11x2y2+y24.(x+3)(x2-1)(x+5)-20
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用基础解系表示线性方程组的全部解(1)【2x1-x2+x3-2x4=1 】(2) 【x1-2x2+x3=-5】 (3) 【x1-x2-x3+x4=0】【-x1+x2+2x3+x4=0 】 【x1+5x2-7x3=2】 【x1-x2+x3-3x4=1】【x1-x2-2x3+2x4=-0.5 】 【3x1+x2-5x3=-8】 【x1-x2-2x
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