<span> 3х+у=2, х в квадр - у в квадр=-12</span>
y=2-3x
x^2-(2-3x)^2=-12
x^2-(4-12x+9x^2)=-12
-8x^2+12x+8=0
2x^2-3x-2=0
x12=(3+-корень(9+4*2*2))/4=(3+-5)/2=2 -1/2
x1=2
y1=2-6=-4
x2=-1/2=-0.5
y2=2+3/2=7/2=3.5
...........................
Log4(a^2) = 8
2log4(a) = 8
log4(a)=4
a=4^4
теперь наш логарифм:
log2(a) = log2(4^4) = log2(2^8)= 8log2(2) = 8
<span>1) 2,4*4 7/12=11
2) </span><span>2,25:1 1/8=2
3) 11-2=9</span>