Question
Solve the quadratic equation
Solve using the quadratic formula
Solve by completing the square
Solve using the PQ formula
d1=3−23,d2=3+23
Alternative Form
d1≈−1.795832,d2≈7.795832
Evaluate
d2−12d−14=−6d
Move the expression to the left side
d2−6d−14=0
Substitute a=1,b=−6 and c=−14 into the quadratic formula d=2a−b±b2−4ac
d=26±(−6)2−4(−14)
Simplify the expression
More Steps

Evaluate
(−6)2−4(−14)
Multiply the numbers
More Steps

Evaluate
4(−14)
Multiplying or dividing an odd number of negative terms equals a negative
−4×14
Multiply the numbers
−56
(−6)2−(−56)
Rewrite the expression
62−(−56)
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+56
Evaluate the power
36+56
Add the numbers
92
d=26±92
Simplify the radical expression
More Steps

Evaluate
92
Write the expression as a product where the root of one of the factors can be evaluated
4×23
Write the number in exponential form with the base of 2
22×23
The root of a product is equal to the product of the roots of each factor
22×23
Reduce the index of the radical and exponent with 2
223
d=26±223
Separate the equation into 2 possible cases
d=26+223d=26−223
Simplify the expression
More Steps

Evaluate
d=26+223
Divide the terms
More Steps

Evaluate
26+223
Rewrite the expression
22(3+23)
Reduce the fraction
3+23
d=3+23
d=3+23d=26−223
Simplify the expression
More Steps

Evaluate
d=26−223
Divide the terms
More Steps

Evaluate
26−223
Rewrite the expression
22(3−23)
Reduce the fraction
3−23
d=3−23
d=3+23d=3−23
Solution
d1=3−23,d2=3+23
Alternative Form
d1≈−1.795832,d2≈7.795832
Show Solution
