82x2−32=2x+4
To solve the equation 82x2−32=2x+4, let's proceed through these steps:
- Step 1: Simplify and eliminate fractions by cross-multiplying.
- Step 2: Rearrange and simplify the resulting equation.
- Step 3: Solve for the variable x.
Now, let's work through each step:
Step 1: Cross-multiply to eliminate the fractions.
We perform cross multiplication as follows:
(2x2−32)×2=8×(x+4)
This gives us:
4x2−64=8x+32
Step 2: Rearrange and simplify the equation.
Move all terms to one side to set the equation to zero:
4x2−8x−96=0
Simplify by dividing the entire equation by 4:
x2−2x−24=0
Step 3: Solve the quadratic equation by factoring.
Factor the quadratic equation:
(x−6)(x+4)=0
Set each factor to zero and solve for x:
- x−6=0⇒x=6
- x+4=0⇒x=−4
Considering the given multiple-choice answers, the correct solution is:
x=6
Therefore, the solution to the problem is x=6.