50
2.2
Calculate the value of: (100 - 3k)
k=1
Answers
Answered by
0
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
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