Question
Solve the equation(The real numbers system)
x∈/R
Evaluate
82x4=72x−1
Evaluate
4x4=72x−1
Cross multiply
x4×7=4(2x−1)
Simplify the equation
7x4=4(2x−1)
Expand the expression
More Steps

Evaluate
4(2x−1)
Apply the distributive property
4×2x−4×1
Multiply the numbers
8x−4×1
Any expression multiplied by 1 remains the same
8x−4
7x4=8x−4
Move the expression to the left side
7x4−(8x−4)=0
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
7x4−8x+4=0
Solution
x∈/R
Show Solution

Solve the equation(The complex numbers system)
x1≈−0.659969−0.931923i,x2≈−0.659969+0.931923i,x3≈0.659969−0.051372i,x4≈0.659969+0.051372i
Evaluate
82x4=72x−1
Cancel out the common factor 2
4x4=72x−1
Cross multiply
x4×7=4(2x−1)
Simplify the equation
7x4=4(2x−1)
Expand the expression
More Steps

Evaluate
4(2x−1)
Apply the distributive property
4×2x−4×1
Multiply the numbers
8x−4×1
Any expression multiplied by 1 remains the same
8x−4
7x4=8x−4
Move the expression to the left side
7x4−(8x−4)=0
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
7x4−8x+4=0
Calculate
x≈0.659969+0.051372ix≈0.659969−0.051372ix≈−0.659969+0.931923ix≈−0.659969−0.931923i
Solution
x1≈−0.659969−0.931923i,x2≈−0.659969+0.931923i,x3≈0.659969−0.051372i,x4≈0.659969+0.051372i
Show Solution
