Question

50
2.2
Calculate the value of: (100 - 3k)
k=1​

Answer 1

Answer:

Step-by-step explanation:

Given equation is y=(3k+1)x  

2

+2(k+1)x+1=0

Also, it is given that the equation has equal roots.

Then D=0⇒b  

2

−4ac=0

a=3k+1    b=2(k+1)    c=1

b  

2

−4ac=[2(k+1)]  

2

−4(3k+1)=0

⇒4k  

2

+4+8k−12k−4=0

⇒4k  

2

−4k=0

⇒4k(k−1)=0

⇒k=0    k=1

When k=0

equation y=x  

2

+2x+1=0

Roots are x=−1,−1

When k=1

equation 4x  

2

+4x+1=0

Roots are x=  

2

−1

​  

,  

2

−1

​