Solving quadratic equations using quadratic formula.
Quadratic formula works for equations which are hard to factorize, or which do not have real roots.
Quadratic equation is of the form ax square plus bx plus c is equal to 0.
By quadratic formula, we get.
Let us solve following equations by quadratic formula.
2x square plus x minus 5 is equal to 0.
Here a is equal to 2, b is equal to 1, c is equal to -5.
5x square minus 2x plus 7 is equal to 0.
Here a is equal to 5, b is equal to -2, c is equal to 7.
Therefore, 5x square minus 2x plus 7 is equal to 0 does not have any real roots.