21c2+3c=1Let c=f and c=g be the solutions to the given equation. If f>g , which of the following is the value of f ?Choose 1 answer:(A) −3+2(B) −3+11(C) 3+2(D) 3+11
Q. 21c2+3c=1Let c=f and c=g be the solutions to the given equation. If f>g, which of the following is the value of f ?Choose 1 answer:(A) −3+2(B) −3+11(C) 3+2(D) 3+11
Set Equation to Zero: Given the quadratic equation(1)/(2)c2+3c=1, we first need to bring all terms to one side to set the equation to zero.(1)/(2)c2+3c−1=0Multiply through by 2 to clear the fraction:c2+6c−2=0
Use Quadratic Formula: Now we use the quadratic formula to solve for c:c=2a−b±b2−4acHere, a=1, b=6, and c=−2.
Calculate Discriminant: Calculate the discriminant (b2−4ac):Discriminant=(6)2−4(1)(−2)=36+8=44
Plug Values into Formula: Now plug the values into the quadratic formula:c = [−6±44] / 2c = [−6±4×11] / 2c = [−6±211] / 2c = −3±11
Find Solutions: We have two solutions for c:c=−3+11 and c=−3−11Since f > g, we choose the larger solution for f.
Choose Larger Solution: The larger solution is f=−3+11, which corresponds to answer choice (B).