Question 1039873
The standard form is {{{y=ax^2+bx+c}}}
Use the formula {{{(a+b)^2=a^2+2ab+b^2}}}
{{{y=2(x^2+8x+16)-21}}}
Open the brackets
{{{y=2x^2+16x+32-21}}}
{{{y=2x^2+16x+11}}}
Answer: {{{y=2x^2+16x+11}}}