Question

answer 5 th one please fast​

Answer 1

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☆13 - 5x - 2x² - 8x³

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{ (9+6x-2x²)+(4x-1-5x³+x²)}-{(4x³+2x²-5)+(15x-x³-x²)}

=>{9+6x-2x²+4x-1-5x³+x²}-{4x³+2x²-5+15x-x³-x²}

=>{8+10x-x²-5x³}-{3x³+x²-5+15x}

=>8+10x-x²-5x³-3x³-x²+5-15x

=>13-5x-2x²-8x³

hope it helps... ^_^