Question

1/(8+2V5)+1/(7-15) simplify​

Answer 1

Answer:

-0.044

Step-by-step explanation:

1/(8+2V5)+1/(7-15)  = ( 7-15+8+2V5) / [(7-15)(8+2V5)]   {Cross multiplying}

                           = (15-15+2V5) / (56+14V5-120-30V5)

                           = 2V5 / (-64 -16V5)

                           (Cancel 2 in numerator and denominator)

                           = V5 / (-32 - 8V5)  {Apply value of V5 , V5=2.24}

                           =2.24 / ( -32 -17.89)

                           = -0.044