Question

将y=3x∧2+4x-1化成y=a（x-h）∧2+k的形式

Answer 1

y=3x^2+4x-1

=3( x^2 - 4/3x - 1/3 )

=3( x^2 - 4/3x + 4/9 - 4/9 - 1/3 )

=3( x^2 - 4/3x + 4/9 ) - 7/3

=3( x- (2/3)^2 ) - 7/3

a= 3

h= 2/3

k= -7/3