nyiimecca1477 nyiimecca1477
  • 18-05-2021
  • Mathematics
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If using the method of completing the square to solve the quadratic equation X^2-10x+21=0

Respuesta :

ac06230812345
ac06230812345 ac06230812345
  • 18-05-2021

X=1/10 (X^2+21)

Hope this helped!

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hnori22003
hnori22003 hnori22003
  • 18-05-2021

x^2 - 10x + 21 = 0

Add both sides 4

x^2 - 10x + 21 + 4 = 0 + 4

x^2 - 10x + 25 = 4

( x - 5 )^2 = 4

___________________

1 ) x - 5 = 2 ==》 x = 7

2 ) x - 5 = - 2 ==》 x = 3

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