hannah2757
hannah2757 hannah2757
  • 14-05-2019
  • Mathematics
contestada

I’m confused please help

Im confused please help class=

Respuesta :

akephd
akephd akephd
  • 14-05-2019

This is completing the square.

So x^2-6x-12=0

Add 12 to both sides so x^2-6x=12

Now take half the x term and square it. Add this number to both sides.

So x^2-6x+9=12+9

Which is the same as (x-3)^2=21

This is answer 2.

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