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Solve each problem.
1. Find the value of k so that the remainder is 25 when kx²-x+1 is divided by x-3.
2. Find the value of k so that the remainder is -1 when 5x²+kx-25 is divided by x+2.
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(1) Due to the Remainder theorem, this passage
" the remainder is 25 when
is divided by x-3 "
means that the value of the polynomial is equal to 25 at x = 3.
So, we substitute x= 3 into the polynomial and equate it to 25.
It gives us an equation
= 25,
from which we find k
9k - 3 + 1 = 25
9k -2 = 25
9k = 25 + 2 = 27
k = 27/9 = 3. ANSWER
Solved.
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Solve part (2) by THE SAME WAY on your own.