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Topic starter November 23, 2020 11:18 pm  

STA100 General Mathematics and Biostatistics GDB 1 Solution & Discussion Fall 2020

Question Description

Dear Students,

 

Solve the Quadratic Equation

{x^2} - 18x + 45 = 0  by factorization method.

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GDB STA100 Probability & Statistics Fall 2020
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Topic starter November 23, 2020 11:22 pm  

STA100 General Mathematics and Biostatistics GDB 1 Solution & Discussion Fall 2020

STA100 GDB Solution.

 

{x^2} - 18x + 45 = 0

{x^2} - 15x - 3x + 45 = 0

x\left( {x - 15} \right) - 3\left( {x - 15} \right) = 0

\left( {x - 15} \right)\left( {x - 3} \right) = 0

\begin{array}{l} Now\\ x - 15 = 0\;\;\;\;\;\;\;,\;\;\;\;\;\;\;\;\;x - 3 = 0 \end{array}

\begin{array}{l} \;\;\;\;\;\;x = 15\;\;\;\;\;\;,\;\;\;\;\;\;\;\;\;\;\;\;\;x = 3\\ \;\;\;\;\;\;\;\;\;\;\;\;Solution\;Set = \left\{ {15,3} \right\} \end{array}

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