Question

ii) Find m if (m-12) +20m-12)x+ 2 = 0 has real and equal roots.​

Answer 1

Equation = (21m)x + 2 = 0 [ Here a is 0 ]

a = 0 , b = 21m , c = 2

since , it has real and equal roots

Hence, D = 0

b² - 4ac = 0

(21m)² - 4 × 0 × 2 = 0

441m² = 0

m² = 0

m = 0