Program:

Here are the Quadratic Equation problem program and its tested outputs.

Equivalence Class testing

Considering Output domain first,

O₁ = Not a quadratic equation when a = 0
O₂ = Real roots,  b² – 4ac > 0
O₃ = Equal roots,  b² – 4ac = 0
O₄ = Imaginary roots,  b² – 4ac < 0
Now Input domain,
I₁ = { 0< a <= 10 }
I₂ = { a<0 }
I₃ = { a>10 }
I₄ = { 0< b <= 10 }
I₅= { b<0 }
I₆ = { b>10 }
I₇ = { 0< c <= 10 }
I₈ = { c<0 }
I₉ = { c>10 }
I₁₀ = { a= 0 }
In total there are 14 test cases, 4 for possible outputs and 10 for different different combinations of input.

Input and output domains	a	b	c	Expected Output	Program Output	Tested Outcome
O1	0	5	5	Not Quadratic	Not Quadratic	Pass
O2	1	5	5	Real	Real	Pass
O3	5	5	5	Imaginary	Imaginary	Pass
O4	5	10	5	Equal	Equal	Pass
I1	5	5	5	Imaginary	Imaginary	Pass
I2	-1	5	5	Invalid Input	Invalid Input	Pass
I3	11	5	5	Invalid Input	Invalid Input	Pass
I4	5	5	5	Imaginary	Imaginary	Pass
I5	5	-1	5	Invalid Input	Invalid Input	Pass
I6	5	11	5	Invalid Input	Invalid Input	Pass
I7	5	5	5	Imaginary	Imaginary	Pass
I8	5	5	-1	Invalid Input	Invalid Input	Pass
I9	5	5	11	Invalid Input	Invalid Input	Pass
I10	0	5	5	Not Quadratic	Not Quadratic	Pass

In given table, first four are from output domain and other are from inputs.