Question
Solve the quadratic equation
Solve using the quadratic formula
Solve by completing the square
Solve using the PQ formula
x1=−521+3121,x2=52−1+3121
Alternative Form
x1≈−1.093575,x2≈1.055114
Evaluate
(30−x)×2=x2×52
Multiply the terms
2(30−x)=x2×52
Use the commutative property to reorder the terms
2(30−x)=52x2
Swap the sides
52x2=2(30−x)
Expand the expression
More Steps

Evaluate
2(30−x)
Apply the distributive property
2×30−2x
Multiply the numbers
60−2x
52x2=60−2x
Move the expression to the left side
52x2−60+2x=0
Rewrite in standard form
52x2+2x−60=0
Substitute a=52,b=2 and c=−60 into the quadratic formula x=2a−b±b2−4ac
x=2×52−2±22−4×52(−60)
Simplify the expression
x=104−2±22−4×52(−60)
Simplify the expression
More Steps

Evaluate
22−4×52(−60)
Multiply
More Steps

Multiply the terms
4×52(−60)
Rewrite the expression
−4×52×60
Multiply the terms
−12480
22−(−12480)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
22+12480
Evaluate the power
4+12480
Add the numbers
12484
x=104−2±12484
Simplify the radical expression
More Steps

Evaluate
12484
Write the expression as a product where the root of one of the factors can be evaluated
4×3121
Write the number in exponential form with the base of 2
22×3121
The root of a product is equal to the product of the roots of each factor
22×3121
Reduce the index of the radical and exponent with 2
23121
x=104−2±23121
Separate the equation into 2 possible cases
x=104−2+23121x=104−2−23121
Simplify the expression
More Steps

Evaluate
x=104−2+23121
Divide the terms
More Steps

Evaluate
104−2+23121
Rewrite the expression
1042(−1+3121)
Cancel out the common factor 2
52−1+3121
x=52−1+3121
x=52−1+3121x=104−2−23121
Simplify the expression
More Steps

Evaluate
x=104−2−23121
Divide the terms
More Steps

Evaluate
104−2−23121
Rewrite the expression
1042(−1−3121)
Cancel out the common factor 2
52−1−3121
Use b−a=−ba=−ba to rewrite the fraction
−521+3121
x=−521+3121
x=52−1+3121x=−521+3121
Solution
x1=−521+3121,x2=52−1+3121
Alternative Form
x1≈−1.093575,x2≈1.055114
Show Solution
