a2-4a+3=0 , a=?

a2-4a+3=0 , a=? Correct Answer 3

<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo> = </mo><mi>a</mi><mn>2</mn><mo> + </mo><mn>4</mn><mi>a</mi><mo> + </mo><mn>3</mn><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mo> = </mo><mi>a</mi><mn>2</mn><mo> - </mo><mn>3</mn><mi>a</mi><mo> - </mo><mi>a</mi><mo> + </mo><mn>3</mn><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mo> = </mo><mi>a</mi><mo>(</mo><mi>a</mi><mo> - </mo><mn>3</mn><mo>)</mo><mo> - </mo><mn>1</mn><mo>(</mo><mi>a</mi><mo> - </mo><mn>3</mn><mo>)</mo><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mo> = </mo><mo>(</mo><mi>a</mi><mo> - </mo><mn>3</mn><mo>)</mo><mo>(</mo><mi>a</mi><mo> - </mo><mn>1</mn><mo>)</mo><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/></math>হয় a - 3 = 0 অথবা a - 1 = 0সুতরাং a = 3 a = 1