If the roots of the equation 2r? +8r-m' = 0 are equal then value of mis
(a) - 3
(6)-1
(c) 1
(d) - 2
Answers
Answered by
0
Answer:
the Value is -2 this answer is correct or not
Answered by
1
Answer:
Step-by-step explanation:
Value of m = -2
Step-by-step explanation:
Given quadratic equation 2x²+8x-m³=0
Compare this with ax²+bx+c=0, we get
a = 2, b = 8 , c = -m³
Discreminant (D) = 0
/* Since, roots are equal */
b²- 4ac = 0
=> 8² - 4 × 2 × (-m³)=0
=> 64 + 8m³ = 0
/* Divide each term by 8 , we get
=> 8 + m³ = 0
=> m³ = -8
=> m³ = (-2)³
=> m = -2
Therefore,
Value of m = -2
please mark as brainliest if it helps
Similar questions