Question

solve 3 ( x km- 1 ) + x - 2 = 7 ​

Answer 1

Answer:

The given equation is  

(k+1)x  

2

−2(k−1)x+1=0  

comparing it with ax  

2

+bx+c=0 we get

a=(k+1),b=−2(k−1) and c=1

∴ Discriminant,

D=b  

2

−4ac=4(k−1)  

2

−4(k+1)×1

=4(k  

2

−2k+1)−4k−4

⇒4k  

2

−8k+4−4k−4=4k  

2

−12k

Since roots are real and equal, so

D=0⇒4k  

2

−12k=0⇒4k(k−3)=0

⇒ either k=0 or k−3=0⇒4k(k−3)=0

Hence, k=0,3.

Step-by-step explanation:

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Answer 2

Answer:

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