Question

How do you change y=x^2-2x-3 to vertex form?
The formula is a(x-h)^2 + k
I add 3 to both sides and then I don't know what to do after that.. So now I have y+3=1x^2-2x

Answer 1

@jabez177 @KendrickLamar2014 @Awolflover1

Answer 2

x^2-2x+1=(x-1)^2

Answer 3

So it's 1(x-1)^2-3? @Er.Mohd.AMIR

Answer 4

No add -1

Answer 5

complete the square as above
y=1(x^2-2x+1-1)-3

Answer 6

1(x-1)^2-4

Answer 7

Why do I add -1? @Er.Mohd.AMIR

Answer 8

for complteing square add 1 and therefore subtract 1 for balence the eq.

Answer 9

a2+b2-2ab=(a-b)2
so x2-2.x.1+1-1=(x-1)2-1

Answer 10

Wait, the equation is x^2-2x-3, plus 3 on each end. y+3=x^2-2x then y+3=1(x-1)^2 but im confused on where the 3 goes.. @Er.Mohd.AMIR

Answer 11

y=x^2-2x-3
y=x^2-2x+1-1-3
y=(x^2-2x+1)-4
y=(x-1)^2-4

Answer 12

now its clear1?

Answer 13

Ohhhhhhh. Yes! Thank you! I was so confused on this problem.

Answer 14

so its clear now