P²-4p+4-p²-2p+3p+6=-3p+10
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Sin(x) + sin(2x) + sin(3x) = cos(x) + cos(2x) + cos(3x)
<span>sin(2x) + sin(2x – x) + sin(2x + x) = cos(2x) + cos(2x – x) + cos(2x + x) </span>
<span>sin(2x) + sin(2x)·cos(x) – cos(2x)·sin(x) + sin(2x)·cos(x) + cos(2x)·sin(x) = </span>
<span>= cos(2x) + cos(2x)·cos(x) + sin(2x)·sin(x) + cos(2x)·cos(x) – sin(2x)·sin(x) </span>
<span>sin(2x) + 2·sin(2x)·cos(x) = cos(2x) + 2·cos(2x)·cos(x) </span>
<span>sin(2x)·[1 + 2·cos(x)] = cos(2x)·[1 + 2·cos(x)] </span>
<span>[sin(2x) – cos(2x)]·[1 + 2·cos(x)] = 0
</span>
1)5m-6p
2)4a-3b
3)1-y
4)-c+1
Если будут вопросы- обращайтесь:)