On dividing 3x3+x2+2x+5 by a polynomial g[x] the quotient and remainder are 3x-5 and 9x+10.Find g[x]
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Answered by
22
♧♧HERE IS YOUR ANSWER♧♧
♤♤RULE♤♤
Let, f(x) be any polynomial. On division by g(x), if it gives quotient q(x) and remainder r(x), the relation is :
f(x) = g(x).q(x) + r(x)
♤♤SOLUTION♤♤
Here, we consider :
f(x) = 3x³ + x² + 2x + 5
q(x) = 3x - 5
r(x) = 9x + 10
Now, applying the relation f(x) = g(x).q(x) + r(x), we get :
(3x³ + x² + 2x + 5) = (3x - 5).g(x) + (9x + 10)
=> (3x - 5).g(x) = (3x³ + x² + 2x + 5) - (9x + 10)
=> (3x - 5).g(x) = (3x³ + x² - 7x - 5)
=> g(x) = (3x³ + x² - 7x - 5)/(3x - 5)
Now,
Therefore,
g(x) = x² + 2x + 1
♧♧HOPE THIS HELPS YOU♧♧
♤♤RULE♤♤
Let, f(x) be any polynomial. On division by g(x), if it gives quotient q(x) and remainder r(x), the relation is :
f(x) = g(x).q(x) + r(x)
♤♤SOLUTION♤♤
Here, we consider :
f(x) = 3x³ + x² + 2x + 5
q(x) = 3x - 5
r(x) = 9x + 10
Now, applying the relation f(x) = g(x).q(x) + r(x), we get :
(3x³ + x² + 2x + 5) = (3x - 5).g(x) + (9x + 10)
=> (3x - 5).g(x) = (3x³ + x² + 2x + 5) - (9x + 10)
=> (3x - 5).g(x) = (3x³ + x² - 7x - 5)
=> g(x) = (3x³ + x² - 7x - 5)/(3x - 5)
Now,
Therefore,
g(x) = x² + 2x + 1
♧♧HOPE THIS HELPS YOU♧♧
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