Question
Solve the equation
r1=−2,r2=2
Evaluate
41(r4×21)=2
Remove the parentheses
41r4×21=2
Multiply the terms
More Steps

Evaluate
41×21
To multiply the fractions,multiply the numerators and denominators separately
4×21
Multiply the numbers
81
81r4=2
Multiply by the reciprocal
81r4×8=2×8
Multiply
r4=2×8
Multiply
r4=16
Take the root of both sides of the equation and remember to use both positive and negative roots
r=±416
Simplify the expression
More Steps

Evaluate
416
Write the number in exponential form with the base of 2
424
Reduce the index of the radical and exponent with 4
2
r=±2
Separate the equation into 2 possible cases
r=2r=−2
Solution
r1=−2,r2=2
Show Solution

Rewrite the equation
x4+2x2y2+y4=16
Evaluate
41(r4×21)=2
Evaluate
More Steps

Evaluate
41(r4×21)
Remove the parentheses
41r4×21
Multiply the terms
More Steps

Evaluate
41×21
To multiply the fractions,multiply the numerators and denominators separately
4×21
Multiply the numbers
81
81r4
81r4=2
Multiply both sides of the equation by LCD
81r4×8=2×8
Simplify the equation
r4=2×8
Simplify the equation
r4=16
To covert the equation to rectangular coordinates using conversion formulas,substitute x2+y2 for r2
(x2+y2)2=16
Solution
x4+2x2y2+y4=16
Show Solution
