Q. Find all values of x.log2(2x2+2)−log2(3x+1)=0
Combine logarithms: Use the property of logarithms to combine the two logarithms into a single logarithm. The subtraction of logarithms with the same base can be rewritten as the logarithm of the quotient of the arguments. log2(2x2+2)−log2(3x+1)=log2(3x+12x2+2)
Set equal and solve: Set the combined logarithm equal to zero and solve for the argument.Since log2(3x+12x2+2)=0, we can use the definition of a logarithm to write this as an exponential equation.20=3x+12x2+2
Simplify exponential equation: Simplify the exponential equation. 20 is equal to 1, so we have: 1=3x+12x2+2
Clear denominator: Multiply both sides of the equation by (3x+1) to clear the denominator.1×(3x+1)=(2x2+2)3x+1=2x2+2
Rearrange to quadratic: Rearrange the equation to form a quadratic equation.0=2x2−3x+(2−1)0=2x2−3x+1
Factor or use formula: Factor the quadratic equation, if possible, or use the quadratic formula to find the values of x. The quadratic equation 2x2−3x+1 can be factored as (2x−1)(x−1)=0
Solve for x: Set each factor equal to zero and solve for x.2x−1=0 or x−1=0For 2x−1=0, x=21For x−1=0, x=1