If (x - 1)(y + 3) = 0 what can you say about x if y = -3?
Not getting???
since the product is zero and (y+3) = 0
x can be anything at all
On the other hand, if y is, say, 2, then y+3 ≠0, and you must have (x-1) = 0
Not getting???
x can be anything at all
On the other hand, if y is, say, 2, then y+3 ≠0, and you must have (x-1) = 0