Question

Solve the quadratic equation by completing the square.

x2 + 4x - 3 = 0
A) x = 4 ±7

B) x = 2 ±7

C) x = -4 ±7

D) x = -2 ±7

Answer 1

the answer is D i just did it on usa test prep

Explanation:

Answer 2

X^2+4x -3=0
Take 3 to the right side
X^2+4X. =3
Get the number with the X only so
Half of 4 is 2 and 2times is 4 add this number to both sides

X^2+4x+4= 3+4
(X+2)^2= 7

Sq rt each side can't type it it looks like a check mark

So X+2= sq rt of 7
-2. -2

X= -2 +- sq rt of 7

D