Question

5 If the roots of the equation 2x² + 12x + c = 0 are equal, then c is equal to​

Answer 1

Step-by-step explanation:

Given, p(x

2

+x)+k=0 has equal roots.

so, b

2

=4ac

px

2

+px+k=0

(p)

2

=4(p)(k)

p=0,orp=4k

and given −5 is root of 2x

2

+px−15=0

put x=−5

2(−5)

2

+(−5)p−15=0

50−5p−15=0

p=7

p=4k

7=4k

k=7/4

Answer 2

Step-by-step explanation:

Refer To Attachment ✌✌