Question
Simplify the expression
18c6−4
Evaluate
9c6×2−4
Solution
18c6−4
Show Solution

Factor the expression
2(9c6−2)
Evaluate
9c6×2−4
Multiply the terms
18c6−4
Solution
2(9c6−2)
Show Solution

Find the roots
c1=−36162,c2=36162
Alternative Form
c1≈−0.778272,c2≈0.778272
Evaluate
9c6×2−4
To find the roots of the expression,set the expression equal to 0
9c6×2−4=0
Multiply the terms
18c6−4=0
Move the constant to the right-hand side and change its sign
18c6=0+4
Removing 0 doesn't change the value,so remove it from the expression
18c6=4
Divide both sides
1818c6=184
Divide the numbers
c6=184
Cancel out the common factor 2
c6=92
Take the root of both sides of the equation and remember to use both positive and negative roots
c=±692
Simplify the expression
More Steps

Evaluate
692
To take a root of a fraction,take the root of the numerator and denominator separately
6962
Simplify the radical expression
More Steps

Evaluate
69
Write the number in exponential form with the base of 3
632
Reduce the index of the radical and exponent with 2
33
3362
Multiply by the Conjugate
33×33262×332
Simplify
33×33262×39
Multiply the numbers
More Steps

Evaluate
62×39
Use na=mnam to expand the expression
62×692
The product of roots with the same index is equal to the root of the product
62×92
Calculate the product
6162
33×3326162
Multiply the numbers
More Steps

Evaluate
33×332
The product of roots with the same index is equal to the root of the product
33×32
Calculate the product
333
Reduce the index of the radical and exponent with 3
3
36162
c=±36162
Separate the equation into 2 possible cases
c=36162c=−36162
Solution
c1=−36162,c2=36162
Alternative Form
c1≈−0.778272,c2≈0.778272
Show Solution
