Bring to Standard Form: First, we need to bring the equation to standard quadratic form ax2+bx+c=0 by moving all terms to one side.−6x2−3x−2=−8Now, add 8 to both sides to get all terms on one side.−6x2−3x−2+8=−8+8
Simplify Equation: Simplify the equation by combining like terms. −6x2−3x+6=0Now we have a quadratic equation in standard form.
Calculate Discriminant: To solve the quadratic equation, we can use the quadratic formulax=2a−b±b2−4ac, where a=−6, b=−3, and c=6. First, calculate the discriminant (b2−4ac). Discriminant = (−3)2−4(−6)(6) Discriminant = 9−(−144) Discriminant = 9+144 Discriminant = 153
Apply Quadratic Formula: Now, plug the values of a, b, and the discriminant into the quadratic formula.x=2⋅−6−(−3)±153x=−123±153
Simplify Square Root: Simplify the square root of the discriminant if possible. Since 153 is not a perfect square, we leave it as 153. Now we have two possible solutions for x: x=−123+153 or x=−123−153
Factor Out 3: We can simplify the solutions further by factoring out a 3 in the numerator.x=−123(1+153/3) or x=−123(1−153/3)x=−4(1+153/3) or x=−4(1−153/3)
Check Options: Now, we compare our solutions with the given options. None of the options match our solutions exactly, but we can check if the discriminant we found 153 can be simplified to match any of the options.153 can be simplified to 17×9, which is 3×17.
Replace Square Root: Replace 153 with 317 in our solutions.x=31+317/(−4) or x=31−317/(−4)x=−41+17 or x=−41−17
Match Solutions: Now, our solutions match option (D). x=−41+17 or x=−41−17
More problems from Solve a quadratic equation using the quadratic formula