x=?
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Source: Beat The GMAT — Problem Solving |
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truplayer256
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Did you mean (4 - x)/(2 + x) = x ? If so, then:
(4 - x) = x(2 + x) => 4 - x = 2x + x^2 => x^2 + 3x - 4 = 0
Choose option 3.
(4 - x) = x(2 + x) => 4 - x = 2x + x^2 => x^2 + 3x - 4 = 0
Choose option 3.
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adthedaddy
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One thing to note overhere is that do not go ahead and start factorizing the eqn to find the roots.
Given that (4-x)/(2+x)=x gives x^2+3x-4=0
STOP --> This is the answer i.e. "Zero"
If you get ahead and factorize x^2+3x-4=0, you will get x=1 or x=-4 as roots.
To confuse you, both of the above roots are a part of the options.
Hence Zero (Option 3) is the answer.
Given that (4-x)/(2+x)=x gives x^2+3x-4=0
STOP --> This is the answer i.e. "Zero"
If you get ahead and factorize x^2+3x-4=0, you will get x=1 or x=-4 as roots.
To confuse you, both of the above roots are a part of the options.
Hence Zero (Option 3) is the answer.
