Math, asked by sanjayyadav3827, 10 months ago

Polynomials bx²+x+5 and bx³-2x+5 are divided by polynomial x-3 and the remainders are m and n respectively. If m-n=0 then find the value of b.

Answers

Answered by hukam0685
15

Answer:

b =  \frac{1}{2}  \\  \\

Step-by-step explanation:

x - 3 \:  \: ) \: b {x}^{2}  + x + 5 \:  \: (bx + 3b + 1 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: b {x}^{2}  - 3bx \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ( - ) \:  \:  \:  \: ( + ) \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  -  -  -  -  -  \\  \:  \:  \:  \:  \:  \:  \:  \:  \: x(3b + 1) + 5 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  x(3b + 1)  - 9b  - 3  \\  \:  \:  \:  \:  \:  \:  \: ( - ) \:  \:  \:  \:  \:   \:  \:  \: \: ( + ) \:  \:  \:  \:  \: ( + ) \\  \:  \:  \:  \:  \:  \:  \:  \:  \:   -  -  -  -  -  -  -  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 8 + 9b \\  \\

ATC

m = 8 + 9b \\  \\

x - 3 \:  \: ) \: b {x}^{3}   - 2 x + 5 \:  \: (b {x}^{2}  + 3bx + 9b - 2 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: b {x}^{3}  - 3b {x}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ( - ) \:  \:  \:  \: ( + ) \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  -  -  -  -  -  \\  \:  \:  \:  \:  \:  \:  \:  \:  \: 3b {x}^{2}  - 2x + 5 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  3b {x}^{2}  - 9bx  \\  \:  \:  \:  \:  \:  \:  \: ( - ) \:  \:  \: \:  \: \: ( + ) \:  \:  \:  \:  \:  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:   -  -  -  -  -  -  -  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: x(9b - 2) +5 \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: x(9b - 2) - 27b + 6 \\  \:  \:  \:  \:  \:  \:  \:  \:  \: ( - ) \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ( + ) \:  \:  \:  \:  \:  \:  \:  \:  \: ( - ) \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \: -  -  -  -  -  -  -  -  -  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 27b - 1 \\  \\

n = 27b - 1 \\  \\

If m-n=0

8 + 9b - (27b - 1) = 0 \\  \\ 8 + 9b - 27b + 1 = 0 \\  \\  - 18b =  - 9 \\  \\ b =  \frac{9}{18}  \\  \\ b =  \frac{1}{2}  \\  \\

Hope it helps you.

Answered by Anisamallik
16

Step-by-step explanation:

Hope it will helps you☺☺

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