<span>3⁵ˣ⁺¹²=81ˣ
</span>
<span>3⁵ˣ⁺¹²=3⁴ˣ
</span><span>
</span><span>5х+12=4х
</span><span>
</span><span>х=-12
</span>
2a² = 2(√3 - 1)² = 2(3 - 2√3 + 1) = 6 - 4√3 + 2 = 8 - 4√3 = 4(2 - √3)
(x²-9):(x+3)=((x-3)(x+3)):(x+3)=x-3
Х+2=4-х
2х=2 х=1
3х+1=5х-3
2х=4 х=2
2х-3=2-3х
5х=5 х=1