4x ^ 2 – 5x – 12 = 0
To solve the equation 4x^2 – 5x – 12 = 0, you can use the quadratic formula:
x = (-b ± sqrt(b^2 – 4ac)) / 2a
where a, b, and c are coefficients of the equation in the form ax^2 + bx + c.
Substituting the values from the given equation, we get:
x = (-(-5) ± sqrt((-5)^2 – 4(4)(-12))) / 2(4)
Simplifying this expression, we get:
x = (5 ± sqrt(25 + 192)) / 8
x = (5 ± sqrt(217)) / 8
Therefore, the two solutions to the equation 4x^2 – 5x – 12 = 0 are:
x = (5 + sqrt(217)) / 8 ≈ 2.346
x = (5 – sqrt(217)) / 8 ≈ -1.281
So, the values of x that satisfy the equation are approximately 2.346 and -1.281.