Math, asked by asharafmansuri2, 11 months ago

Slove the equation. 2x^2+4x-60=0 by completing method square

Answers

Answered by yash320a
0

beautiful question........

Answered by Uniquedosti00017
1

Answer:

2 {x}^{2}  + 4x - 60 = 0 \\  =  > 2 {x}^{2}  + 4x = 60 \\ dividing \: both \: by \: 2. \\  =  >  {x}^{2}  + 2x = 30 \\  add \:  {1}^{2} to \: both \:  \: sides \\  =  >  {x}^{2}  + 2x +  {1}^{2}  = 30 +  {1}^{2}  \\  =  > ( {x + 1)}^{2}  = 30 + 1 \\  =  > x + 1 =  \sqrt{31} \: or  \:  -  \sqrt{31} \\ x =  - 1 +  \sqrt{31}  \\ or \\ x =  - 1 -  \sqrt{31}

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