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Question

x^{2} - (a + b) x + a b = 0; x = ?

a,b

a

b

ab

ANSWER : 1

Short Descrption

Descrption

<math xmlns = "http://www.w3.org/1998/Math/MathML"><msup><mi>x</mi><mn>2</mn></msup><mo> - </mo><mo>(</mo><mi>a</mi><mo>  +  </mo><mi>b</mi><mo>)</mo><mi>x</mi><mo>  +  </mo><mi>a</mi><mi>b</mi><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mo>&#x21D2;</mo><msup><mi>x</mi><mn>2</mn></msup><mo> - </mo><mi>a</mi><mi>x</mi><mo> - </mo><mi>b</mi><mi>x</mi><mo>  +  </mo><mi>a</mi><mi>b</mi><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mo>&#x21D2;</mo><mi>x</mi><mo>(</mo><mi>x</mi><mo> - </mo><mi>a</mi><mo>)</mo><mo> - </mo><mi>b</mi><mo>(</mo><mi>x</mi><mo> - </mo><mi>a</mi><mo>)</mo><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mo>&#x21D2;</mo><mo>(</mo><mi>x</mi><mo> - </mo><mi>a</mi><mo>)</mo><mo>(</mo><mi>x</mi><mo> - </mo><mi>b</mi><mo>)</mo><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mi>x</mi><mo> - </mo><mi>a</mi><mo> = </mo><mn>0</mn><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>,</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mi>x</mi><mo> - </mo><mi>b</mi><mo> = </mo><mn>0</mn><mspace linebreak = "newline"/><mi>x</mi><mo> = </mo><mi>a</mi><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>&#xA0;</mo><mo>,</mo><mo>&#xA0;</mo><mi>x</mi><mo> = </mo><mi>b</mi></math>

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