## countonme123 Group Title quadratic equation by completing the square. check both roots . equation below 2 years ago 2 years ago

1. countonme123 Group Title

$x^2-6x=7$

2. countonme123 Group Title

3. NotTim Group Title

well, first subtract 7 from both sides.

4. satellite73 Group Title

take half of 6 get 3 write $(x-3)^2=7+...$ then think "3 squared is 9" write $(x-3)^2=7+9=16$ take the root, don't forget the $$\pm$$ get $x-3=\pm\sqrt{16}$ $x-3=\pm4$

5. satellite73 Group Title

then solve $x-3=4\iff x=7$ or $x-3=-4\iff x=-1$

6. satellite73 Group Title

all the steps are there

7. countonme123 Group Title

wow i think i get it let me try it on paper

8. countonme123 Group Title

hmm thats not right

9. countonme123 Group Title

wait my mistake you got half right but there is supposed to be one more answer

10. NotTim Group Title

no...satellite gave enough I think. There's 2 values for x in his answer. I dont think there's a third one is a trinomial like this.

11. countonme123 Group Title

you are right my bad again i didnt see or