Answer:
[tex](x+4)^{2}=19[/tex]
Step-by-step explanation:
we have
[tex]x^{2} +8x-3=0[/tex]
Group terms that contain the same variable, and move the constant to the opposite side of the equation
[tex]x^{2} +8x=3[/tex]
Complete the square. Remember to balance the equation by adding the same constants to each side
[tex](x^{2} +8x+16)=3+16[/tex]
[tex](x^{2} +8x+16)=19[/tex]
Rewrite as perfect squares
[tex](x+4)^{2}=19[/tex]
