+0  
 
0
1376
3
avatar

please explain this step by step

 

1-sqrt3/1+sqrt3  = -2sqrt3

 Nov 14, 2016

Best Answer 

 #2
avatar
+5

Simplify the following:
(1-sqrt(3))/(1+sqrt(3))

Multiply numerator and denominator of (1-sqrt(3))/(1+sqrt(3)) by sqrt(3)-1:
((1-sqrt(3)) (sqrt(3)-1))/((1+sqrt(3)) (sqrt(3)-1))

(1+sqrt(3)) (sqrt(3)-1) = -1+1 sqrt(3)-sqrt(3)+sqrt(3) sqrt(3) = -1+sqrt(3)-sqrt(3)+3 = 2:
((1-sqrt(3)) (sqrt(3)-1))/(2)

(1-sqrt(3)) (sqrt(3)-1) = -1+1 sqrt(3)-(-sqrt(3))-sqrt(3) sqrt(3) = -1+sqrt(3)+sqrt(3)-3 = 2 sqrt(3)-4:
(2 sqrt(3)-4)/(2)

Factor 2 out of 2 sqrt(3)-4 giving 2 (sqrt(3)-2):
(2 (sqrt(3)-2))/(2)

(2 (sqrt(3)-2))/(2) = 2/2×(sqrt(3)-2) = sqrt(3)-2:
Answer: |sqrt(3)-2

 Nov 14, 2016
 #1
avatar
+2

(1-sqrt3)/(1+sqrt3) → (1-sqrt3)(1-sqrt3)/( (1+sqrt3)(1-sqrt3) ) → (1-2sqrt3+3)/(1-3)

 

→ (4 - 2sqrt3)/(-2) → -2 + sqrt3

.

 Nov 14, 2016
 #2
avatar
+5
Best Answer

Simplify the following:
(1-sqrt(3))/(1+sqrt(3))

Multiply numerator and denominator of (1-sqrt(3))/(1+sqrt(3)) by sqrt(3)-1:
((1-sqrt(3)) (sqrt(3)-1))/((1+sqrt(3)) (sqrt(3)-1))

(1+sqrt(3)) (sqrt(3)-1) = -1+1 sqrt(3)-sqrt(3)+sqrt(3) sqrt(3) = -1+sqrt(3)-sqrt(3)+3 = 2:
((1-sqrt(3)) (sqrt(3)-1))/(2)

(1-sqrt(3)) (sqrt(3)-1) = -1+1 sqrt(3)-(-sqrt(3))-sqrt(3) sqrt(3) = -1+sqrt(3)+sqrt(3)-3 = 2 sqrt(3)-4:
(2 sqrt(3)-4)/(2)

Factor 2 out of 2 sqrt(3)-4 giving 2 (sqrt(3)-2):
(2 (sqrt(3)-2))/(2)

(2 (sqrt(3)-2))/(2) = 2/2×(sqrt(3)-2) = sqrt(3)-2:
Answer: |sqrt(3)-2

Guest Nov 14, 2016
 #3
avatar+12531 
0

please explain this step by step

 

laugh

 Nov 14, 2016

0 Online Users