Still -16...
-16 minus -16 is 0.
16 - 16 = 0
-16-(-16)=0
16
It is 0. Anything minus itself alone is 0.
18 + 12 + 0 - 4 - 10 = 16
8
'x' is +4 or -4 .
9x squared plus 16 = 0 factored is plus and minus 4/3 i.
Applying BODMAS: 16 - (2 x 2 x 4) = 16 - 16 = 0
9x^(2) + 16 DOES NOT factor. Remember ; two squared terms with a plus(+) between them DOES NOT factor However, two squared terms with a minus(-) between them DOES factor . Hence 9x^(2) + 16 = (3x)^2) + 4^(2) does NOT factor However, 9x^(2) - 16 = (3x)^2) - 4^(2) does factor to ( (3x - 4)(3x + 4) Note the two different signs.
16° Freezing is normally the freezing point of water which is 0°C. Thus -16° is 16° below zero.