1 99:59:59,999 --> 99:59:59,999 We divide x to the third plus five x minus four by x minus x, Actually I think this is supposed to be 2 99:59:59,999 --> 99:59:59,999 x squared, let me correct it. So we are gonna to divide, x to the third plus five x minus four by x squared 3 99:59:59,999 --> 99:59:59,999 minus x plus 1 and just to see the different ways we can rewrite this, we could rewrite this as , x to 4 99:59:59,999 --> 99:59:59,999 the third plus five x minus four divided by x squared minus x plus 1 5 99:59:59,999 --> 99:59:59,999 or may be the best way to write in this circumstance is we are going to write algebric long division 6 99:59:59,999 --> 99:59:59,999 is to write it as x squared minus x plus one 7 99:59:59,999 --> 99:59:59,999 divided into x to the third plus 8 99:59:59,999 --> 99:59:59,999 and actually I am going to leave some blank spaces we dont have an x degree an x squared term 9 99:59:59,999 --> 99:59:59,999 but I am gonna leave some space for it just so that we can align everything in the proper space 10 99:59:59,999 --> 99:59:59,999 when we actually do the division 11 99:59:59,999 --> 99:59:59,999 so, x to the third plus nothing to the x squared power plus five x minus four 12 99:59:59,999 --> 99:59:59,999 so we have a place for the third power, the second power, the first power 13 99:59:59,999 --> 99:59:59,999 and the zero'th power, so now lets do a little bit of algebraic long division 14 99:59:59,999 --> 99:59:59,999 lets look at the highest degree term, 15 99:59:59,999 --> 99:59:59,999 x squared goes into the x to the third, how many times? 16 99:59:59,999 --> 99:59:59,999 Well it goes into it x times, x to the third divided by x squared 17 99:59:59,999 --> 99:59:59,999 is equal to x to the three minus two which is equal to x to the one 18 99:59:59,999 --> 99:59:59,999 which is equal to x, so it goes x times 19 99:59:59,999 --> 99:59:59,999 I will write the x right over here and we multiply x times this entire thing 20 99:59:59,999 --> 99:59:59,999 x times, x square is x to the third, 21 99:59:59,999 --> 99:59:59,999 x times, negative x is negative x squared, 22 99:59:59,999 --> 99:59:59,999 x times one is , positive x 23 99:59:59,999 --> 99:59:59,999 and now we want to subtract this whole expression from that whole expression 24 99:59:59,999 --> 99:59:59,999 and thats the same thing as adding the opposite or 25 99:59:59,999 --> 99:59:59,999 multiplying each of these terms by negative one and adding into these terms 26 99:59:59,999 --> 99:59:59,999 so lets do that 27 99:59:59,999 --> 99:59:59,999 so we have negative x to the third, 28 99:59:59,999 --> 99:59:59,999 negative one times negative x squared is positive x squared