Question

If the roots of the equation 2x² + 8x - m³= 0 are equal then value of m is
(a) - 3
(b)-1
(c) 1
(d) - 2​

Answer 1

Answer:

-2 is the answer

Step-by-step explanation:

the value of m is -2

Answer 2

Answer:

-2 is the value of m

Step-by-step explanation:

given that,

the roots of the equation are equal. so,

D = 0

b²-4ac = 0

(8)²-4(2)(-m³) = 0

64+8m³ = 0

8m³ = -64

m³ = -8

m³ = (-2)³

m= -2

hope it helps