√2(sin2x•cosπ/4+cos2x•sinπ/4)+
√3cosx=sin2x-1
sin2x+cos2x+√3cosx=sin2x-1
cos2x+√3cosx+1=0
2cos²x+√3cosx=0
cosx(2cosx+√3)=0
1)cosx=0
x=π/2+πk
2)2cosx=-√3
cosx=-√3/2
x=±(π-√6)+2πk
x=±5π/6+2πk;k€Z
1. Ax+ay
2. -pa+pb
3. 3x^5- 9x^2
4. -10x^4+ 5x^7
5. 3x^2-6-5x^2-15=-2x^2-21
6. 15n^2-5n^2 -10n^2+6n= 6n