Раз а и в положительные тогда ответ 1
1) 2.1*1.9=3.99
2) 4.02*3.98=15.9996
3) 19.8*20.2=399.96
4) 1.05*0.95=0.9975
5) (3*2/3)^2-(2*1/3)^2=(11/3)^2-(7/3)^2=121/9-49/9=72/9=8
6) (4*1/3)^2-(1*1/6)^2=(25/6)^2-(7/6)^2=625/36-49/36=576/36=16
22-3х=4
-3х=4-22
-3х=-18
х=6
Решение
<span>Log3 X +logx 3 =2
x > 0, x </span>≠ 1<span>
log</span>₃ x + log₃ 3/log₃ x = 2
log₃ ² - 2log₃x + 1 = 0
log₃x = z
z² - 2z + 1 = 0
(z - 1)² = 0
z = 1
<span>log₃x = 1
</span><span>x = 3</span>
9x²-12x²y³=3x²(3-4y³)
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