Math, asked by Wreakit, 1 year ago

On dividing 3x3+x2+2x+5 by a polynomial g[x] the quotient and remainder are 3x-5 and 9x+10.Find g[x]

Answers

Answered by Swarup1998
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,

3x - 5)3 {x}^{3}  +  {x}^{2}  - 7x - 5( {x}^{2}  + 2x + 1 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 3 {x}^{3}  - 5 {x}^{2}  \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:     - ..... + ..................... \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  6 {x}^{2}  - 7x - 5 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 6 {x}^{2}  - 10x \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   - ...... + ........... \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  3x - 5 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 3x - 5 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   - .... + .. \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 0

Therefore,

g(x) = x² + 2x + 1

♧♧HOPE THIS HELPS YOU♧♧
Answered by Anonymous
4

Answer:

PLease mark me as brainlist if it helps you.

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