Question

Please someone help

Answer 1

Its -1,3 

y=4x2+8x+7

There is a formula for finding the vertex=       y=ax2+bx+c

h=−b2a and k=c−b24a

Solve for h with a=4 and b=8 and c=7

h=−b2a=−82⋅4=−1

=−b2a=−82⋅4=−1

Solve for k

k=c−b24a=7−824⋅4=7−6416=7−4=3

Our vertex is at (−1,3)

 y=4x2+8x+7 with vertex at (−1,3)