ADDING: same sign, add and keep that sign. opposite sides, subtract their absolute values and use the sign of the number with the larger absolute value
SUBRTRACTING: change the sign of the subtrahend (2nd number) then ADD using rules above.
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Placing a question mark at the end of a phrase does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered.
To add polynomials , simply combine similar terms. Combine similar terms get the sum of the numerical coefficients and affix the same literal coefficient .
1.1519+k*pi radians or 66+180*k degrees for all integers k.
a2 + b2 = c2
Eight. -4 -3 -2 -1 1 2 3 4