Q. Find the solutions of the quadratic equation 2x2+6x−2=0.Choose 1 answer:(A) −43±413(B) 23±213(C) −23±213(D) −23±213i
Quadratic Formula: We will use the quadratic formula to solve the equation 2x2+6x−2=0. The quadratic formula is given by x=2a−b±b2−4ac, where a, b, and c are the coefficients of the quadratic equation ax2+bx+c=0.
Identifying Coefficients: First, identify the coefficients a, b, and c from the quadratic equation. In our equation, a=2, b=6, and c=−2.
Calculating the Discriminant: Next, calculate the discriminant, which is the part under the square root in the quadratic formula: b2−4ac. For our equation, the discriminant is 62−4(2)(−2)=36+16=52.
Plugging Values into the Formula: Now, plug the values of a, b, and the discriminant into the quadratic formula to find the solutions for x. We have x=4−6±52. Simplify 52 to 4⋅13=213.
Simplifying the Formula: Substitute 52 with 213 in the formula to get x=4−6±213. Now, we can simplify this by dividing both terms in the numerator by 2.
Final Solutions: After simplifying, we get x=2−3±13. These are the solutions to the quadratic equation.