Question
Solve the inequality
x∈(−∞,−62]∪[62,+∞)
Evaluate
2x2∣x∣≥22
Transform the expression
2x2×x≥22,x≥02x2(−x)≥22,x<0
Calculate
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Calculate
2x2×x≥22
Expand the expression
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Evaluate
x2×x
Use the product rule an×am=an+m to simplify the expression
x2+1
Add the numbers
x3
2x3≥22
Divide both sides
22x3≥222
Divide the numbers
x3≥222
Divide the numbers
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Evaluate
222
Reduce the numbers
12
Calculate
2
x3≥2
Take the 3-th root on both sides of the equation
3x3≥32
Calculate
x≥32
Simplify the root
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Evaluate
32
Use mna=mna to simplify the expression
3×22
Multiply the numbers
62
x≥62
x≥62,x≥02x2(−x)≥22,x<0
Calculate
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Calculate
2x2(−x)≥22
Calculate
−2x2×x≥22
Expand the expression
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Evaluate
x2×x
Use the product rule an×am=an+m to simplify the expression
x2+1
Add the numbers
x3
−2x3≥22
Change the signs on both sides of the inequality and flip the inequality sign
2x3≤−22
Divide both sides
22x3≤2−22
Divide the numbers
x3≤2−22
Divide the numbers
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Evaluate
2−22
Reduce the numbers
1−2
Calculate
−2
x3≤−2
Take the 3-th root on both sides of the equation
3x3≤3−2
Calculate
x≤3−2
Simplify the root
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Evaluate
3−2
An odd root of a negative radicand is always a negative
−32
Simplify the radical expression
−62
x≤−62
x≥62,x≥0x≤−62,x<0
Calculate
x≥62x≤−62,x<0
Solution
x∈(−∞,−62]∪[62,+∞)
Show Solution
