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What is the remainder?

label Algebra
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The polynomial y^3+y^2+my-7 has the same remainder when it is divided by either y-1 or y+1.  What is the remainder?

Apr 21st, 2015

First we have to find the value of m, the only solution possible is with y values -1 and 1 respectively so that it is divided by either y-1 or y+1

1*3+1*2+1*m -7 = (-1)*3+(-1)*2+(-1)*m -7

m= -1

Now let's find the reminder: y^3+ y^2 -y -7 / y-1  = -6

                                  and y^3+ y^2 -y -7 / y+1  = -6

Answer: Reminder = -6

Apr 21st, 2015

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Apr 21st, 2015
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