作业帮通分1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3) 3/(x+1)(x+3)
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通分1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3) 3/(x+1)(x+3)
通分1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3) 3/(x+1)(x+3)
通分1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3) 3/(x+1)(x+3)
1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3)
=1/(x+1)(x+2) +1/(x+2)(x+3) + 1/(x+1)(x+3)
=[x+3+ x+1+x+2]/[(x+1)(x+2)(x+3)]
=(3x+6)/[(x+1)(x+2)(x+3)]
=3/[(x+1)(x+3)]
1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3)
=1/(x+1)(x+2) +1/(x+2)(x+3)+1/(x+1)(x+3)
=((x+3)+(x+1)+(x+2))/((x+1)(x+2)(x+3))
=(3x+6)/((x+1)(x+2)(x+3))
=(3*(x+2))/((x+1)(x+2)(x+3))
=3/((x+1)(x+3))
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