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Heya....hope it helps
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Given f(x) = x^4 - 6x^3 + 16x^2 - 25x + 10.
Given g(x) = x^2 - 2x + k.
We need to divide p(x) by g(x).
x^2 - 2x + k) x^4 - 6x^3 + 16x^2 - 25x + 10
x^4 - 2x^3 + kx^2
-------------------------------------------------------
-4x^3 + (16 - k)x^2 - 25x + 10
-4x^3 + 8x^2 -4kx
---------------------------------------------------------
8x^2 - kx^2 - 25x + 4kx + 10
8x^2 - 16x + 8k
---------------------------------------------------------
-kx^2 - 9x + 4kx + 10 - 8k
-kx^2 + 2kx -k^2
----------------------------------------------------------------------
-9x + 2kx + 10 - 8k + k^2
We got remainder as
= > -9x + 2kx + 10 - 8k + k^2
= > (2k - 9)x + k^2 - 8k + 10
Given remainder is x + a.
(2k - 9)x + k^2 - 8k + 10 = x + a.
Now,
(1) 2k - 9 = 1
2k = 10
k = 5.
(2) k^2 - 8k + 10 = a
(5)^2 - 8(5) + 10 = a
25 - 40 + 10 = a
a = -5.
Therefore the value of a = -5, k = 5.
Hope this helps!
Given g(x) = x^2 - 2x + k.
We need to divide p(x) by g(x).
x^2 - 2x + k) x^4 - 6x^3 + 16x^2 - 25x + 10
x^4 - 2x^3 + kx^2
-------------------------------------------------------
-4x^3 + (16 - k)x^2 - 25x + 10
-4x^3 + 8x^2 -4kx
---------------------------------------------------------
8x^2 - kx^2 - 25x + 4kx + 10
8x^2 - 16x + 8k
---------------------------------------------------------
-kx^2 - 9x + 4kx + 10 - 8k
-kx^2 + 2kx -k^2
----------------------------------------------------------------------
-9x + 2kx + 10 - 8k + k^2
We got remainder as
= > -9x + 2kx + 10 - 8k + k^2
= > (2k - 9)x + k^2 - 8k + 10
Given remainder is x + a.
(2k - 9)x + k^2 - 8k + 10 = x + a.
Now,
(1) 2k - 9 = 1
2k = 10
k = 5.
(2) k^2 - 8k + 10 = a
(5)^2 - 8(5) + 10 = a
25 - 40 + 10 = a
a = -5.
Therefore the value of a = -5, k = 5.
Hope this helps!
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