Question
Solve the equation
x1=−234,x2=2312
Alternative Form
x1≈−0.793701,x2≈1.144714
Evaluate
(x2×2x)2−2(x2×2x)−3=0
Remove the parentheses
(x2×2x)2−2x2×2x−3=0
Simplify
More Steps

Evaluate
(x2×2x)2−2x2×2x−3
Multiply
More Steps

Multiply the terms
x2×2x
Multiply the terms with the same base by adding their exponents
x2+1×2
Add the numbers
x3×2
Use the commutative property to reorder the terms
2x3
(2x3)2−2x2×2x−3
Multiply
More Steps

Multiply the terms
−2x2×2x
Multiply the terms
−4x2×x
Multiply the terms with the same base by adding their exponents
−4x2+1
Add the numbers
−4x3
(2x3)2−4x3−3
Rewrite the expression
More Steps

Evaluate
(2x3)2
To raise a product to a power,raise each factor to that power
22(x3)2
Evaluate the power
4(x3)2
Evaluate the power
4x6
4x6−4x3−3
4x6−4x3−3=0
Factor the expression
(2x3−3)(2x3+1)=0
Separate the equation into 2 possible cases
2x3−3=02x3+1=0
Solve the equation
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Evaluate
2x3−3=0
Move the constant to the right-hand side and change its sign
2x3=0+3
Removing 0 doesn't change the value,so remove it from the expression
2x3=3
Divide both sides
22x3=23
Divide the numbers
x3=23
Take the 3-th root on both sides of the equation
3x3=323
Calculate
x=323
Simplify the root
More Steps

Evaluate
323
To take a root of a fraction,take the root of the numerator and denominator separately
3233
Multiply by the Conjugate
32×32233×322
Simplify
32×32233×34
Multiply the numbers
32×322312
Multiply the numbers
2312
x=2312
x=23122x3+1=0
Solve the equation
More Steps

Evaluate
2x3+1=0
Move the constant to the right-hand side and change its sign
2x3=0−1
Removing 0 doesn't change the value,so remove it from the expression
2x3=−1
Divide both sides
22x3=2−1
Divide the numbers
x3=2−1
Use b−a=−ba=−ba to rewrite the fraction
x3=−21
Take the 3-th root on both sides of the equation
3x3=3−21
Calculate
x=3−21
Simplify the root
More Steps

Evaluate
3−21
An odd root of a negative radicand is always a negative
−321
To take a root of a fraction,take the root of the numerator and denominator separately
−3231
Simplify the radical expression
−321
Multiply by the Conjugate
32×322−322
Simplify
32×322−34
Multiply the numbers
2−34
Calculate
−234
x=−234
x=2312x=−234
Solution
x1=−234,x2=2312
Alternative Form
x1≈−0.793701,x2≈1.144714
Show Solution
