General way to write a quadratic equation is:
ax2 + bx + c = 0
Here a, b and c are numbers that vary for different equations.
So if the equation was:
2x2 + 7x + 11 = 0
Then a = 2, b = 7, c = 11.
The formula for the solution is:
This formula will work for all equations that can be solved.
Solve 2x2 - 5x - 6 = 0
Here a = 2, b = -5, c = -6
Substituting these values in the formula, gives you: