А^2+3ав+2а^2-в^2-5в2=3а^2+3ав-6в^2
3x2y4*4x3y2=12x5y6
0,5с4* (3b3c)2=4,5с6b6
<span>4^sin(x)+2^(5-2sin(x))=18 </span>
<span>4^sin(x)+2^5/2^2sin(x)=18 </span>
<span>t+2^5/t=18 </span>
<span>t^2-18t+32=0 </span>
<span>t1=2 t2=16 </span>
<span>4^sin(x)=2 x=(-1)^k*п/6+пк к Є Z </span>
<span>4^sin(x)=4^2 </span>
<span>Sin(x)=2 </span>
<span>Ответ: x=(-1)^k*п/6+пк к Є Z</span>
<span>!</span>
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-5x=-4
x=-4:(-5)
х=0,8
Ответ:0,8
D^3 + 27a^3 = (d + 3a)(d^2 - 3ad + 9a^2)