What two functions can be used to solve the following equation and what is their solution set x squared plus 4X - 1 = 2x + 2

1 answer

To solve the equation \( x^2 + 4x - 1 = 2x + 2 \), we can first rearrange it into standard form. Start by moving all terms to one side of the equation:

\[ x^2 + 4x - 1 - 2x - 2 = 0 \]

This simplifies to:

\[ x^2 + 2x - 3 = 0 \]

Now, we can factor the quadratic equation. We need to find two numbers that multiply to \(-3\) (the constant term) and add to \(2\) (the coefficient of \(x\)). The numbers that fit this are \(3\) and \(-1\). Therefore, we can factor the equation as follows:

\[ (x + 3)(x - 1) = 0 \]

Now we can find the solutions by setting each factor to zero:

  1. \(x + 3 = 0 \rightarrow x = -3\)
  2. \(x - 1 = 0 \rightarrow x = 1\)

Thus, the solutions to the equation are \(x = -3\) and \(x = 1\).

The solution set is:

\[ { -3, 1 } \]