How do you divide (x^4 + x^3 +1x -1 )/ (x^2 + 1)x4+x3+1x1x2+1?

1 Answer
Aug 29, 2017

x^2+x-1x2+x1

Explanation:

"one way is to use the divisor as a factor in the numerator"one way is to use the divisor as a factor in the numerator

"consider the numerator"consider the numerator

color(red)(x^2)(x^2+1)color(magenta)(-x^2)+x^3+x-1x2(x2+1)x2+x3+x1

=color(red)(x^2)(x^2+1)color(red)(+x)(x^2+1)cancel(color(magenta)(-x))-x^2cancel(+x)-1

=color(red)(x^2)(x^2+1)color(red)(+x)(x^2+1)color(red)(-1)(x^2+1)cancel(color(magenta)(+1))cancel(-1)

"quotient "=color(red)(x^2+x-1)," remainder "=0

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