(5х-3)(х+2)-(х+4)²=0
5х²+10х-3х-6-х²+8х+16=0
4x²+15x+10=0
D=4²-4•15•10=16-600=-584
ответ:корней нет
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Xlog2( 3 )+1 = log2 (18)
log2(3^x) +log(2)2 = log2(18)
log2(3^x / 2) =log2(18)
3^x /2 =18
3^x = 9
3^x=3^2
x=2
(4+a)^2= 16+8a+a^2
(2x-1)^2= 4x^2-4x+1
(2a+3b)^2= 4a^2+12ab+9b^2
<span>(x3-3)^2= x^6-6x^3+9</span>
<span><u>3^2 : 3^k =3^(2-k)</u>
3^2 : 3^-k=3^(2+k)
3^2-3^k=9-3^k
(3^2)^-k=3^(-2k)</span>