Math, asked by bikramprasad991, 2 months ago

Exercise 5.2.
Divide the first polynomial by the second and check the solution by using the way
Dividend - Divisor Quotient + Remainder.
1. 9x^2- 24x + 16 by 3x - 4
2. 9x^3 - 3x^2-5x + 7 by 3x - 1​

Answers

Answered by Anonymous
44

\mathtt{SOLUTION:-}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

 \mathtt \red{3x - 4) {9x}^{2} - 24x + 16(3x - 4 }

 \mathtt{  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  {9x}^{2}  - 12x}

 \mathtt{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  -  \:  \:  \:  \:  \:  \:  \:  \:  + }

________________

 \mathtt{  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:   \:  \:  \:  \:  \:  \:  \:    - 12x + 16}

 \mathtt{  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:   \:  \:  \:  \:  \:  \:  \:    - 12x  -  16}

 \mathtt{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   +  \:  \:  \:  \:  \:   \:  \: +   }

_____________________

 \mathtt \red{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:   \:  \:\:  \:  \:  \:   \:  \:0}

_____________________

 \mathtt{CHECK:-}

 =  \mathtt \red{(3x - 4)(3x - 4)}

 =  \mathtt \red{3x(3x - 4) - 4(3x - 4)}

 =  \mathtt \red{ {9x}^{2} - 12x - 12x + 16 }

 =  \mathtt \red{ {9x}^{2} - 24x + 16 }

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

 \mathtt \red{3x - 1) {9x}^{3}   +   {3x}^{2}  - 5x + 7( {3x}^{2}  }

 \mathtt{  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  {9x}^{2}    -   {3x}^{2} }

 \mathtt{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  -  \:  \:  \:  \:  \:  \:  \:  \:  + }

__________________________

 \mathtt{  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:     - 5x + 7 }

___________________________

 \mathtt{CHECK:-}

 =  \mathtt \red{ (3x - 1)( {3x}^{2} )  + ( - 5x + 7)}

 = \mathtt \red{ {9x}^{3} +  {3x}^{2} - 5x + 7}

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