Question

Which of the following shows the square completed in the this equation?
x2 + 7x + 2 = 0

(x = 7)2 = 2
(x + 3.5)2 = 10.25
(x + 2.6)2 = 4.76

Answer 1

\[x^2+7x=-2\\
x^2+7x+\left ( \frac{7}{2}\right )^2=-2+\left ( \frac{7}{2}\right )^2\\
\left ( x+\frac{7}{2}\right )^2=-2+\frac{49}{4}\\
(x+3.5)^2=10.25\]

Answer 2

thank you!

Answer 3

No prob. :)