Question
Solve the equation
Solve for x
x1=43−33,x2=43+33
Alternative Form
x1≈−0.686141,x2≈2.186141
Evaluate
3x2−2x−1=1
Multiply both sides of the equation by LCD
(3x2−2x−1)×6=1×6
Simplify the equation
More Steps

Evaluate
(3x2−2x−1)×6
Apply the distributive property
3x2×6−2x−1×6
Simplify
x2×2+(−x+1)×3
Use the commutative property to reorder the terms
2x2+(−x+1)×3
Multiply the terms
More Steps

Evaluate
(−x+1)×3
Apply the distributive property
−x×3+1×3
Use the commutative property to reorder the terms
−3x+1×3
Any expression multiplied by 1 remains the same
−3x+3
2x2−3x+3
2x2−3x+3=1×6
Any expression multiplied by 1 remains the same
2x2−3x+3=6
Move the expression to the left side
2x2−3x+3−6=0
Subtract the numbers
2x2−3x−3=0
Substitute a=2,b=−3 and c=−3 into the quadratic formula x=2a−b±b2−4ac
x=2×23±(−3)2−4×2(−3)
Simplify the expression
x=43±(−3)2−4×2(−3)
Simplify the expression
More Steps

Evaluate
(−3)2−4×2(−3)
Multiply
More Steps

Multiply the terms
4×2(−3)
Rewrite the expression
−4×2×3
Multiply the terms
−24
(−3)2−(−24)
Rewrite the expression
32−(−24)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
32+24
Evaluate the power
9+24
Add the numbers
33
x=43±33
Separate the equation into 2 possible cases
x=43+33x=43−33
Solution
x1=43−33,x2=43+33
Alternative Form
x1≈−0.686141,x2≈2.186141
Show Solution