I couldn't find this in the forum...
Is xy + xz = 0
1) x=0
2) y + z = 0
I know that statement is sufficient. But statement 2 could have y= -1 and z = 1 to equal zero but we don't know the value of x..??
Any insight on why statement 2 is sufficient here will be appreciated!
Thank you,
Jason
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student22
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Factor xy + xz = 0 into x(y + z) = 0.
Statement 1:
x = 0, so 0 * (y + z) = 0. Sufficient.
Statement 2:
y + z = 0, so x * (0) = 0. Sufficient.
I hope this answers your question, when you factor the problem like this, you don't need to know the value of x for statement 2.
Statement 1:
x = 0, so 0 * (y + z) = 0. Sufficient.
Statement 2:
y + z = 0, so x * (0) = 0. Sufficient.
I hope this answers your question, when you factor the problem like this, you don't need to know the value of x for statement 2.
