Question
Solve the equation
x=22
Alternative Form
x≈0.707107
Evaluate
5x×2∣x×2∣=10
Simplify
More Steps

Evaluate
5x×2∣x×2∣
Use the commutative property to reorder the terms
5x×2∣2x∣
Multiply the terms
10x∣2x∣
10x∣2x∣=10
Separate the equation into 2 possible cases
10x×2x=10,2x≥010x(−2x)=10,2x<0
Evaluate
More Steps

Evaluate
10x×2x=10
Calculate
20x×x=10
Expand the expression
20x2=10
Divide both sides
2020x2=2010
Divide the numbers
x2=2010
Cancel out the common factor 10
x2=21
Take the root of both sides of the equation and remember to use both positive and negative roots
x=±21
Simplify the expression
More Steps

Evaluate
21
To take a root of a fraction,take the root of the numerator and denominator separately
21
Simplify the radical expression
21
Multiply by the Conjugate
2×22
When a square root of an expression is multiplied by itself,the result is that expression
22
x=±22
Separate the equation into 2 possible cases
x=22x=−22
x=22x=−22,2x≥010x(−2x)=10,2x<0
Evaluate
x=22x=−22,x≥010x(−2x)=10,2x<0
Evaluate
More Steps

Evaluate
10x(−2x)=10
Calculate
−20x×x=10
Expand the expression
−20x2=10
Since the left-hand side is always negative or 0,and the right-hand side is always positive,the statement is false for any value of x
x∈/R
x=22x=−22,x≥0x∈/R,2x<0
Evaluate
x=22x=−22,x≥0x∈/R,x<0
Find the intersection
x=22x∈/R,x<0
Find the intersection
x=22x∈/R
Solution
x=22
Alternative Form
x≈0.707107
Show Solution
