Will give brainliest solve x2 + 4x − 4 = 0. x equals the quantity of negative 2 plus or minus square root 16 all over 2 x equals negative 4 plus or minus square root 2 x equals negative 2 plus or minus 2 square root 2 x equals the quantity of 4 plus or minus square root 18 all over 2

ANSWER

EXPLANATION

Given:

We complete the square as follows;

Add 4 to both sides of the equation:

Add half the coefficient of to both sides of the equation.

The Left Hand Side of the equation is now a perfect square.

Take the square root of both sides

Hence the correct answer is option C

Given equation is

compare with

we get: a=1, b=4, c=-4

plug these values into quadratic formula:

Hence finall answer is:

and

you should at least use a calculater

step-by-step explanation:

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option