The product of 0 and any factor is 0.

or

The product of any factor and 0 is 0.

(5)(0) = 0

(0)(5) = 0

(-2)(0) = 0

(0)(-2) = 0

(x)(0) = 0

0x = 0

( x + 2 )( x - 3 )(0) = 0

0( x + 2 )( x - 3 ) = 0