21 m15 quadratic equation
x1=  -b +√ b2 - 4ac
example:
add
a , b, c  are found in the equation
2a
quadratic formula
f(x)= 5x2+9x - 4
ax2+bx+c
x2=  -b - √ b2 - 4ac
subtract
2a
c=  -4
a= 5
b= 9
x1=  -b +√ b2 - 4ac
x1=
2a
x2  + 5x -14
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
x2 - 3x - 10
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
x2 + 8x + 15
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
x2 +11x + 18
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
2x2 + 7x + 3
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
2x2 + 7x - 4
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
3x2 + 10x - 8
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
x2 + 9x + 20
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
x1=  -b +√ b2 - 4ac
x1=
2a
x2 - 5x - 14
quadratic formula
x2=  -b - √ b2 - 4ac
x2=
2a
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