If /M+4/=2, what is the value of M? /module/
(1) M<0
(2) M^2+8M+12=0
The stimulus can be solved for M = -2 or M = -6
(1) does not clarify if it's M = -2 or M = -6 since both are negative.
(2) M^2+8M+12=0 can be factored into:
(M+2)(M+6) = 0, which also has the two solutions M = -2 and M = -6.
Even with both we cannot determine which answer is correct.
value M
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Source: Beat The GMAT — Data Sufficiency |
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