Math, asked by Sachinsaini1273, 11 months ago

If the quadratic equation mx2+2x+m=0 has two equal roots, then find the value of m?

Answers

Answered by vijyakrishnani
22

for \: two \: equal \: roots \\ d = 0 \\ b {}^{2}  - 4ac = 0 \\ therefore \:  {(2)}^{2}  - 4(m)(m) = 0 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  4 - 4 {m}^{2}  = 0 \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   4 = 4 {m}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  {m}^{2}  =  \frac{4}{4}  \\    \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: {m}^{2}  = 1 \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  m =  \sqrt{1}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   m = 1 \\ please \: mark \: it \: brainliest.....
Answered by richathakurchailly2
1

Step-by-step explanation:

fortwoequalroots

d=0

b

2

−4ac=0

therefore(2)

2

−4(m)(m)=0

4−4m

2

=0

4=4m

2

m

2

=

4

4

m

2

=1

m=

1

m= 1

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