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

Question

09-04-2017
Mathematics

contestada

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

Respuesta :

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f(x)= sqrt3x+7, g(x)= sqrt3x-7 Find (f+g)(x)

lisee7 lisee7 · Answer 1 · 2017-04-09T07:56:34+02:00

lisee7 lisee7

09-04-2017

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

Answer Link

safyra2005 safyra2005 · Answer 2 · 2020-04-20T18:18:13+02:00

safyra2005 safyra2005

20-04-2020

Answer:

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

Step-by-step explanation:

Answer Link

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

Respuesta :

Otras preguntas

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