What is the sum of the expression? -12+(-39)

-51

Step-by-step explanation:

In the expression, you are adding a negative to another negative; therefore, the answer will be an even smaller negative. Adding a negative is the same as subtracting. So, the expression can be simplified to -12-39. This equals -51.

-51

Step-by-step explanation:

a negative plus a negative makes a negative, which might sound confusing but is pretty simple

for an easy way to figure this out, just add the regular numbers (12 + 39) and then carry the negative symbol over to your answer

in this case, your answer is 51, but carrying over the symbol changes this to -51

hope this helps :)

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step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225