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Exercise 4.2 question no: 1.(ii) question …

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Exercise 4.2 question no: 1.(ii) question solve this quadratic equation by using BY THE METHOD OF COMPLETING THE SQUARE

    • Posted by Ambika Ambika 4 years, 7 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Sia ? 4 years, 7 months ago

    2x2 + x − 6
    Completing the square,
    {tex}\Rightarrow{/tex} x2 + {tex}\frac x2{/tex} − 3 = 0
    {tex}\Rightarrow{/tex} x2 + {tex}\frac x2{/tex} + {tex}\frac 1{16}{/tex} − {tex}\frac 1{16}{/tex} − 3 = 0
    {tex}\Rightarrow{/tex} (x + {tex}\frac 14{/tex}​)2 − {tex}\frac {49}{16}{/tex} ​= 0
    {tex}\Rightarrow{/tex} (x + {tex}\frac 14{/tex} − {tex}\frac 74{/tex}​)(x + {tex}\frac 14{/tex}​ + {tex}\frac 74{/tex}​) = 0
    {tex}\Rightarrow{/tex} (x − {tex}\frac 32{/tex}​) (x + 2) = 0
    {tex}\Rightarrow{/tex} x = {tex}\frac 32{/tex}, −2

    0Thank You

    Vaibhav Kúmár 4 years, 7 months ago

    Completing the square method is not coming

    0Thank You

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