Question
Simplify the expression
21x2
Evaluate
3x(x×8)−x2−2x(x×1)
Remove the parentheses
3x×x×8−x2−2x×x×1
Multiply
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Multiply the terms
3x×x×8
Multiply the terms
24x×x
Multiply the terms
24x2
24x2−x2−2x×x×1
Multiply the terms
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Multiply the terms
−2x×x×1
Rewrite the expression
−2x×x
Multiply the terms
−2x2
24x2−x2−2x2
Collect like terms by calculating the sum or difference of their coefficients
(24−1−2)x2
Solution
21x2
Show Solution

Find the roots
x=0
Evaluate
3x(x×8)−x2−2x(x×1)
To find the roots of the expression,set the expression equal to 0
3x(x×8)−x2−2x(x×1)=0
Use the commutative property to reorder the terms
3x×8x−x2−2x(x×1)=0
Any expression multiplied by 1 remains the same
3x×8x−x2−2x×x=0
Multiply
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Multiply the terms
3x×8x
Multiply the terms
24x×x
Multiply the terms
24x2
24x2−x2−2x×x=0
Multiply the terms
24x2−x2−2x2=0
Subtract the terms
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Simplify
24x2−x2
Collect like terms by calculating the sum or difference of their coefficients
(24−1)x2
Subtract the numbers
23x2
23x2−2x2=0
Subtract the terms
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Simplify
23x2−2x2
Collect like terms by calculating the sum or difference of their coefficients
(23−2)x2
Subtract the numbers
21x2
21x2=0
Rewrite the expression
x2=0
Solution
x=0
Show Solution
