Coordiantes - GMAT Prep
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Source: Beat The GMAT — Data Sufficiency |
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amitansu
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From stem 2 : the graph intersects ordinate (0,-6).
i.e. y-intercept can be known.and putting it in equation :
y=(x+a)(x+b) => y=ab=>y=-6
but how does that tell that where (two points)it intersects x-axis !!
I didn't understand.
Moreover, to me statement 1 also looks insufficient.
from y=(x+a)(x+b)
=>y=x(x+a+b)+ab
=>y=x(x-1)+ab
I am clueless....
i.e. y-intercept can be known.and putting it in equation :
y=(x+a)(x+b) => y=ab=>y=-6
but how does that tell that where (two points)it intersects x-axis !!
I didn't understand.
Moreover, to me statement 1 also looks insufficient.
from y=(x+a)(x+b)
=>y=x(x+a+b)+ab
=>y=x(x-1)+ab
I am clueless....
