Hi!kaf wrote:Hi
Can someone please explain to me why if
x(x+2)=0
x = 0 or x = -2
thanks
Let's start with a simpler equation:
x * y = 0
The only way to get a product of 0 is to multiply by 0. So, if the above equation is true, then either x=0 or y=0.
The same holds true for the equation you posted:
x(x+2) = 0
To get a product of 0, we must multiply by 0. Therefore, either:
x = 0 or x + 2 = 0
and, if x + 2 = 0, then x = -2
So, either x = 0 or x = -2
