Question
Solve the quadratic equation
Solve by factoring
Solve using the quadratic formula
Solve by completing the square
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x1=1,x2=4
Evaluate
−(x−2)=2−(x−2)2
Calculate
−x+2=2−(x−2)2
Swap the sides
2−(x−2)2=−x+2
Expand the expression
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Evaluate
2−(x−2)2
Evaluate the power
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Evaluate
−(x−2)2
Expand the expression
−(x2−4x+4)
Expand the expression
−x2+4x−4
2−x2+4x−4
Subtract the numbers
−2−x2+4x
−2−x2+4x=−x+2
Move the expression to the left side
−4−x2+5x=0
Factor the expression
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Evaluate
−4−x2+5x
Reorder the terms
−4+5x−x2
Rewrite the expression
−4+(4+1)x−x2
Calculate
−4+4x+x−x2
Rewrite the expression
−4+4x+x−x×x
Factor out −4 from the expression
−4(1−x)+x−x×x
Factor out x from the expression
−4(1−x)+x(1−x)
Factor out 1−x from the expression
(−4+x)(1−x)
(−4+x)(1−x)=0
When the product of factors equals 0,at least one factor is 0
−4+x=01−x=0
Solve the equation for x
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Evaluate
−4+x=0
Move the constant to the right-hand side and change its sign
x=0+4
Removing 0 doesn't change the value,so remove it from the expression
x=4
x=41−x=0
Solve the equation for x
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Evaluate
1−x=0
Move the constant to the right-hand side and change its sign
−x=0−1
Removing 0 doesn't change the value,so remove it from the expression
−x=−1
Change the signs on both sides of the equation
x=1
x=4x=1
Solution
x1=1,x2=4
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