How do you use synthetic division to divide ( 2x^3 + 3x^2 + 4 ) / ( 2x + 1 )?

1 Answer
Jul 11, 2018

The remainder is =(9/2) and the quotient is =(x^2+x-1/2)

Explanation:

Let's perform the synthetic division

Divide by 2

color(white)(aaaa)-1/2|color(white)(aaaa)1color(white)(aaaa)+3/2color(white)(aaaaaa)0color(white)(aaaaaa)2

color(white)(aaaaaaaa)|color(white)(aaaa)color(white)(aaaaa)-1/2color(white)(aaaaa)-1/2color(white)(aaaa)1/4

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color(white)(aaaaaaaa)|color(white)(aaaa)1color(white)(aaaaaa)1color(white)(aaaaaa)-1/2color(white)(aaaaa)color(red)(9/4)

The remainder is =(9/2) and the quotient is =(x^2+x-1/2)

(2x^3+3x^2+4)/(2x+1)=(x^2+x-1/2)+(9/4)/(x+1/2)

(2x^3+3x^2+4)/(2x+1)=(x^2+x-1/2)+(9/2)/(2x+1)