Question

find the solutions by any method for given quadratic equation ​

Answer 1

Answer:

x=6+2√30 or x=6-2√30

Explanation:

x²-12x-84 = 0

=> x²-2*x*6 = 84

=>x²-2*x*6+6² = 84 + 6²

=> (x-6)² = 84+36

=> (x-6)² = 120

=> x-6 = ±√120

=> x = 6±2√30

Therefore,

x=6+2√30 or x=6-2√30

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Answer 2

Hey!

Refer the below attachment !

Thanks!