Question

find the value of 'm'..... please.... tomorrow is my exam​

Answer 1

Answer:

use the formula of b^2-4ac=0

Step-by-step explanation:

(5+m)^2-64(m-2)=0

25+m^2+10m-64m+128=0

m^2-54m+153=0

m^2-51m-3m+153=0

m(m-51)-3(m-51)=0

(m-3)(m-51)=0

m=3 or 51

Answer 2

Answer:

Step-by-step explanation:

for having equal roots, the condition is:

D = 0

D= b²-4ac

b²- 4ac = 0

putting values gives

(5+m)² - 64(m-2) = 0

25 + m² + 10m - 64m +128=0

m² -54m + 153 = 0

m² - 51m - 3m + 153 = 0

m( m - 51 ) - 3( m - 51 )=0

(m - 3)(m - 51) = 0

m = 3 or 51

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