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CBSE Class 10 Math 2023 All Sets Solved Paper

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Question : 10 of 20
Marks: +1, -0
If the quadratic equation ax2+bx+c=0ax^2 + bx + c = 0 has two real and equal roots, then 'c' is equal to
Solution:  
For the equation to have equal roots, the discriminant must be equal to zero.
D=b2−4ac=0D = b^2 - 4ac = 0
⇒b2=4ac\Rightarrow b^2 = 4ac
c=  b24ac = \; \frac{b^2}{4a}
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