There is a formula for "the difference of squares." (x + 7)(x - 7) = 0 x = 7, -7
4*7*5+7^2-3*0+15 = 140+49-0+15 = 204
13-6=7
(-7) - 5 - 2 = -14
-5 - (-5) = 0
7 - 7 = 0
6 minus 6 is 0. 0 divided by 7 equals 0. It is zero.
7
0 − 7 = −7 (minus seven)
It is: 7-(+7) = 0
-7-(-7)=0
-7
minus 7 +7 =0 -7+7=0
8
1
(2x - 7)(x + 1)
7 minus 1 times 0 plus 3 divided by 3 equals 8.