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## How do you use the quadratic formula to solve a quadratic equation?

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**How do you use the quadratic formula to solve a quadratic**equation? x2+8x=-7**In this lesson you will learn to solve a quadratic equation**by the quadratic formula.**We can derive the quadratic formula by completing the square****The sign of a number is really important!**-(-3) = 3 (-3)2 = 9**Correctly identifying a, b and c**ax2+bx+c=0 a=1 b=3 c=5 a=1 b=3 c=-1 a=1 b=3 c=5**Solve the equation using the quadratic formula.**2x2-3x= -1/2 ax2+bx+c=0 Where are the a, b and c? 2x2 - 3x = -1/2 c= a=2 b=-3**In this lesson you have learned how to solve a quadratic**equation by using the quadratic formula.**Solve the following equation using the quadratic formula.**x2+18x+45=0**Solve this quadratic by factoring, completing the square and**the quadratic formula. How do the solutions compare? x2+13x+33=0**Describe a situation where the quadratic formula would yield**only one real solution to a quadratic equation.**Write a quadratic equation where the standard form of the**quadratic has c=0. Solve the following by the quadratic formula. 3x2+8x-19=0