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

Mathematics

Madden Berry

2 June, 12:05

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

+1

Answers (1)

Know the Answer?

Kellen Murphy · Answer 1

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

Solve the quadratic equation by completing the square.x2 + 4x - 3 = 0A) x = 4 ±7B) x = 2 ±7C) x = - 4 ±7D) x = - 2 ±7

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