Q. Find the solutions of the quadratic equation 11x2−6x−2=0.Choose 1 answer:(A) −113±1131(B) 113±1131i(C) 113±1131(D) 113±1152i
Identify coefficients: Identify the coefficients of the quadratic equation.The quadratic equation is in the form ax2+bx+c=0. For the equation 11x2−6x−2=0, the coefficients are:a=11, b=−6, and c=−2.
Use quadratic formula: Use the quadratic formula to find the solutions.The quadratic formula is x=2a−b±b2−4ac. We will substitute the values of a, b, and c into the formula.
Calculate discriminant: Calculate the discriminant.The discriminant is the part of the quadratic formula under the square root: b2−4ac. Let's calculate it:Discriminant = (−6)2−4(11)(−2)=36+88=124.
Check discriminant: Check if the discriminant is positive, negative, or zero.Since the discriminant is 124, which is a positive number, we will have two real solutions.
Calculate solutions: Calculate the solutions using the quadratic formula.x=2⋅11−(−6)±124x=226±124x=226±231x=113±31
Simplify solutions: Simplify the solutions.We can simplify the solutions by dividing both the numerator and the denominator by the greatest common divisor, which is already done in the previous step. So, the solutions are:x = (3+31)/11 and x = (3−31)/11