作业帮(x^2-5x)(x^2-5x-10)-56怎么做?
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(x^2-5x)(x^2-5x-10)-56怎么做?
(x^2-5x)(x^2-5x-10)-56怎么做?
(x^2-5x)(x^2-5x-10)-56怎么做?
(x^2-5x)(x^2-5x-10)-56
=(x^2-5x)(x^2-5x-10)-14*4
=(x^2-5x-14)(x^2-5x+4)
=(x-7)(x+2)(x-4)(x-1)
(x^2-5x)(x^2-5x-10)-56
=(x²-5x)(x²-5x-10)-56
=(x²-5x)²-10(x²-5x)-56
=(x²-5x-14)(x²-5x+4)
=(x-7)(x+2)(x-4)(x-1)
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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