Math, asked by aryamannhero, 9 months ago

Plz answer this..... Thx

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Answered by Swetha03K
0

Answer:

             - 450 + 90√7

      b =  -------------------

                     2

Step-by-step explanation:

b × (5 + √7) = 90

          ⇒   b =   90

                      ----------

                       5 + √7

Rationalizing the denominator,

b =   90              5 - √7

    ------------   ×  ----------

     5 + √7         5 - √7

  = 90(5 - √7)

    ----------------

         5 - 7

  = 450 - 90√7

    ------------------

           -2

          - 450 + 90√7

⇒ b =  -------------------

                     2

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