Question
Solve the quadratic equation
Solve using the quadratic formula
Solve by completing the square
Solve using the PQ formula
x1=3−23,x2=3+23
Alternative Form
x1≈−0.464102,x2≈6.464102
Evaluate
x2−6x−3=0
Substitute a=1,b=−6 and c=−3 into the quadratic formula x=2a−b±b2−4ac
x=26±(−6)2−4(−3)
Simplify the expression
More Steps

Evaluate
(−6)2−4(−3)
Multiply the numbers
More Steps

Evaluate
4(−3)
Multiplying or dividing an odd number of negative terms equals a negative
−4×3
Multiply the numbers
−12
(−6)2−(−12)
Rewrite the expression
62−(−12)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
62+12
Evaluate the power
36+12
Add the numbers
48
x=26±48
Simplify the radical expression
More Steps

Evaluate
48
Write the expression as a product where the root of one of the factors can be evaluated
16×3
Write the number in exponential form with the base of 4
42×3
The root of a product is equal to the product of the roots of each factor
42×3
Reduce the index of the radical and exponent with 2
43
x=26±43
Separate the equation into 2 possible cases
x=26+43x=26−43
Simplify the expression
More Steps

Evaluate
x=26+43
Divide the terms
More Steps

Evaluate
26+43
Rewrite the expression
22(3+23)
Reduce the fraction
3+23
x=3+23
x=3+23x=26−43
Simplify the expression
More Steps

Evaluate
x=26−43
Divide the terms
More Steps

Evaluate
26−43
Rewrite the expression
22(3−23)
Reduce the fraction
3−23
x=3−23
x=3+23x=3−23
Solution
x1=3−23,x2=3+23
Alternative Form
x1≈−0.464102,x2≈6.464102
Show Solution
