) 2x^2-4x=0
x(2x-4)=0
x=0
или 2x-4=0
2x=4
<span>x=2</span>
<span>(5,4 -8,4х): 3/4 + 4,6 =9 3/4=0,75</span>
X^-18-7x=0
x^-7x-18=0
D=49-4*1(-18)
D=49+72=121
x=(7-11):2=-4:2=-2
x=(7+11):2=18:2=9
ответ:-2;9
Log₀ ₅ 0.5 log₉ 1/81 - 7^(log₇ 2)= 1 * log₉ 9⁻² - 2 = -2 - 2 = -4
(loga a = 1 a>0 a<>1)
log₃ 6 + log₃ 18 - log₃ 4 = log₃ (6*18 / 4) = log₃ 3³ = 3
9^(0.5 - log₃ 2) - log₃ (log₂ 8)) = (3^2)^0.5 / (3^2)^log₃ 2 - log₃(log₂ 2³)= 3 / 3^log₃ 4 - log₃ 3 = 3/4 -1 = -1/4 =-0.25