Question

which choice converts this standard parabolic equation to its simplified form? y=2(x-(-4))^2+(-21)

Answer 1

expand the expression to find out :)
keep in mind \(\bf y=2(x-(-4))^2+(-21)\implies y=2(x+4)^2+(-21)
\\ \quad \\
\implies y=2(x+4)(x+4)+(-21)\)