Question

find x XSQUARE -4X -4 =0
Plss give me the ans

Answer 1

Answer:

x = (2 + 2√2) or (2 - 2√2)

Explanation:

Given equation:

x² -4x - 4 =0

To find: The value of x

Proof:

= x² -4x - 4 =0

By quadratic formula,

x= [-b ± √(b²-4ac)]/2a

• a = 1
• b = -4
• c = -4

Substituting the values in the equation, we get:

= x = {-(-4)  ± √[(-4)²-4 ( 1 ) ( -4 )] } /2 ( 1 )

⇒ x = [4 ± √ (16 + 16) ]/ 2

⇒ x = (4 ± √32) / 2

⇒ x = ( 4 + √32 )/ 2 or ( 4 - √32 )/2

⇒ x = (2 + 2√2) or (2 - 2√2)

Hope you got that.

Thank You.