You do add the two negatives and get a negative answer but -3 + -5 = -8
Answer:
d = 3x²+ 4x - 7
C'est la réponse j'espère que ça aide.
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Step-by-step explanation:
We have cos( x - y ) = cosxcoy + sinxsiny <=> cos ( π - x ) = cosπcosx + sinπsinx <=> cos ( π - x ) = (-1)cosx + 0sinx = -cosx;
