1
log(5)1/25+log(√3)27=-2+6=4
2
log(0,5)4+log(√5)25=-2+4=2
3
2^(2x-4)=9
2x-4=log(2)9
2x=4+2log(2)3
x=2+log(2)3
4
5^(3x+6)=27
3x+6=log(5)27
3x=-6+3log(5)3
x=-2+log(5)3
<h2>Ответ: А</h2>
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(x - y)(x + y)(x - y) = (x² - y²)(x - y) = x³ + у³ - x²y - xy²
<span>49x^2-42x+9 = (7x-3)^2 = (7x-3)(7x-3)</span>