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(3x3+10x2+13x-27)÷(x2+2x-3)
=
.
第一步商3x,
除下来为4x2+22x-27,
再商4,
余14x-15.
∴(3x3+10x2+13x-27)÷(x2+2x-3)是商3x+4余14x-15.
=
3x3+10x2+13x?27 |
x2+2x?3 |
第一步商3x,
除下来为4x2+22x-27,
再商4,
余14x-15.
∴(3x3+10x2+13x-27)÷(x2+2x-3)是商3x+4余14x-15.
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解:
(3x³+10x²+13x-27)÷(x²+2x-3)
=(3x³+6x²-9x+4x²+8x-12+14x-15)/(x²+2x-3)
=[3x(x²+2x-3)+4(x²+2x-3)+14x-15]/(x²+2x-3)
=3x+4 +(14x-15)/(x²+2x-3)
(3x³+10x²+13x-27)÷(x²+2x-3),商为3x+4,余式为14x-15
(3x³+10x²+13x-27)÷(x²+2x-3)
=(3x³+6x²-9x+4x²+8x-12+14x-15)/(x²+2x-3)
=[3x(x²+2x-3)+4(x²+2x-3)+14x-15]/(x²+2x-3)
=3x+4 +(14x-15)/(x²+2x-3)
(3x³+10x²+13x-27)÷(x²+2x-3),商为3x+4,余式为14x-15
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