Question

Solve x2 + 4x = 4 for x by completing the square. x = −4 x = 0 x equals plus or minus 2 times the square root of 2 plus 2 x equals plus or minus 2 times the square root of 2 minus 2

Answer 1

Answer:

±2$\sqrt{2}$ - 2

Step-by-step explanation:

x² + 4x + 4 = 4 + 4

(x+2)² = 8

x+2 = $\sqrt{8}$;  $\sqrt{8}$ = 2$\sqrt{2}$

x = ±2$\sqrt{2}$ - 2