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kondaur [170]
3 years ago
11

Don't spam...Step by step explaination needed...​

Mathematics
2 answers:
Anastasy [175]3 years ago
4 0

Answer:

\:

(c) 3

Step-by-step explanation:

Given polynomial :

f(x) = 2x³–5x² + 5x

Let the number to be subtracted be n

(x is already in equation so, n is better)

since, 2x – 3 factor given

→

f ( \frac{3}{2} ) = 0

So,

2x {}^{3}  - 5x {}^{2}  + 5 {x}^{2}  - n

2x {}^{3}  - 5x {}^{2}  + 5x - n = 0 \\  \\ 2( \frac{3}{2} ) {}^{3}  - 5( \frac{3}{2} ) {}^{2}  + 5( \frac{3}{2} ) - n = 0 \\  \\ 2 \times  \frac{27}{8}  - 5 \times  \frac{9}{4}  + 5 \times  \frac{3}{2}  - n \:  = 0 \\  \\  \frac{27}{4}   -   \frac{45}{4}  +  \frac{15}{2}  -  \frac{n}{1}  = 0 \\  \\ 27 - 45 + 30 - 4n = 0 \\  \\  12 - 4n \:  = 0   \\ \\n =  \frac{ - 12}{ - 4}  \\  \\ n =  > 3

mr Goodwill [35]3 years ago
3 0

Answer:

\:

(c) 3

Step-by-step explanation:

Given polynomial :

f(x) = 2x³–5x² + 5x

Let the number to be subtracted be n

(x is already in equation so, n is better)

since, 2x – 3 factor given

→

f ( \frac{3}{2} ) = 0

So,

2x {}^{3}  - 5x {}^{2}  + 5 {x}^{2}  - n

2x {}^{3}  - 5x {}^{2}  + 5x - n = 0 \\  \\ 2( \frac{3}{2} ) {}^{3}  - 5( \frac{3}{2} ) {}^{2}  + 5( \frac{3}{2} ) - n = 0 \\  \\ 2 \times  \frac{27}{8}  - 5 \times  \frac{9}{4}  + 5 \times  \frac{3}{2}  - n \:  = 0 \\  \\  \frac{27}{4}   -   \frac{45}{4}  +  \frac{15}{2}  -  \frac{n}{1}  = 0 \\  \\ 27 - 45 + 30 - 4n = 0 \\  \\  12 - 4n \:  = 0   \\ \\n =  \frac{ - 12}{ - 4}  \\  \\ n =  > 3

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