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Algebra Level 2

Find the value of c c for which x 2 − 4 − 2 x = c ( x − 4 ) x^2-4-2x=c(x-4) has equal roots.

4 4 5 5 3 3 2 2

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Bhavya Jain by Bhavya Jain , 23, India

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3 solutions

Alex Zhong
Apr 21, 2015

How about c = 10 c=10 ?

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That's not in options

Pranjal Jain - 6 years, 1 month ago

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So the question should be change (values to value)

Agastya Chandrakant - 6 years, 1 month ago

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Done!

Pranjal Jain - 6 years, 1 month ago
Aquilino Madeira
Jul 8, 2015

c=2 v c=10

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Shubham Gupta
Apr 21, 2015

X^2-4-2X=c(x-4) X^2-2x-4-cx+4 c=0

And by b^2-4a.c.=0. [Equal roots]

(C+2)+4(4(1-c))=0 Solve it

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