Question

Which equation is y = 2x2 – 8x + 9 rewritten in vertex form?
y = 2(x – 2)2 + 9
y = 2(x – 2)2 + 5
y = 2(x – 2)2 + 1
y = 2(x – 2)2 + 17

Answer 1

y = 2(x – 2)2 + 1

Answer 2

\(\Large y = 2x^2 – 8x + 9=2(x^2-4x+\frac{9}{2})\\\Large =2[(x^2-2\times2x+2^2)+(\frac{9}{2}-2^2)] =2(x-2)^2+1\)

Answer 3

thank you

Answer 4

:)