Question
Solve the equation
x1=35−1226,x2=0,x3=35+1226
Alternative Form
x1≈−0.014283,x2=0,x3≈70.014283
Evaluate
21×21x=4x2−7x×10×x
Multiply the terms
More Steps

Evaluate
21×21
To multiply the fractions,multiply the numerators and denominators separately
2×21
Multiply the numbers
41
41x=4x2−7x×10×x
Simplify
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Evaluate
4x2−7x×10×x
Multiply the terms
4x2−70x×x
Multiply the terms
4(x2−70x)x
Multiply the terms
4x(x2−70x)
41x=4x(x2−70x)
Rewrite the expression
4x=4x(x2−70x)
Cross multiply
x×4=4x(x2−70x)
Simplify the equation
4x=4x(x2−70x)
Evaluate
x=x(x2−70x)
Expand the expression
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Evaluate
x(x2−70x)
Apply the distributive property
x×x2−x×70x
Multiply the terms
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Evaluate
x×x2
Use the product rule an×am=an+m to simplify the expression
x1+2
Add the numbers
x3
x3−x×70x
Multiply the terms
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Evaluate
x×70x
Use the commutative property to reorder the terms
70x×x
Multiply the terms
70x2
x3−70x2
x=x3−70x2
Move the expression to the left side
x−(x3−70x2)=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
x−x3+70x2=0
Factor the expression
x(1−x2+70x)=0
Separate the equation into 2 possible cases
x=01−x2+70x=0
Solve the equation
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Evaluate
1−x2+70x=0
Rewrite in standard form
−x2+70x+1=0
Multiply both sides
x2−70x−1=0
Substitute a=1,b=−70 and c=−1 into the quadratic formula x=2a−b±b2−4ac
x=270±(−70)2−4(−1)
Simplify the expression
More Steps

Evaluate
(−70)2−4(−1)
Simplify
(−70)2−(−4)
Rewrite the expression
702−(−4)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
702+4
Evaluate the power
4900+4
Add the numbers
4904
x=270±4904
Simplify the radical expression
More Steps

Evaluate
4904
Write the expression as a product where the root of one of the factors can be evaluated
4×1226
Write the number in exponential form with the base of 2
22×1226
The root of a product is equal to the product of the roots of each factor
22×1226
Reduce the index of the radical and exponent with 2
21226
x=270±21226
Separate the equation into 2 possible cases
x=270+21226x=270−21226
Simplify the expression
x=35+1226x=270−21226
Simplify the expression
x=35+1226x=35−1226
x=0x=35+1226x=35−1226
Solution
x1=35−1226,x2=0,x3=35+1226
Alternative Form
x1≈−0.014283,x2=0,x3≈70.014283
Show Solution
