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a) 3x⁵=12x³
x⁵-4x³=0
x³(x²-4)=0
x³(x-2)(x+2)=0
x=0 lub x=2 lub x=-2
b) 27x⁷= -8x⁴
27x⁷+8x⁴=0
x⁴(27x³+8)=0
x⁴(3x+2)(9x²-6x+4)=0
9x²-6x+4>0 (Δ<0)
x=0 lub x=-⅔
c) 5x⁵= 20x
5x(x⁴-4)=0
x(x²-2)(x²+2)=0
x²+2>0
x=0 lub x=-√2 lub x=√2
d) 6x⁴ - 12x³+6x²=0
6x²(x²-2x+1)=0
x²(x-1)²=0
x=0 lub x=1
e) x⁷- x⁶= 6x⁵
x⁵(x²-x-6)=0
x⁵(x-3)(x+2)=0
x=0 lub x=3 lub x=-2
f) ¹/₉ x⁶ + x⁵= ⅓ x⁵ - x⁴
x⁶ + 9x⁵ - 3 x⁵ + 9x⁴ =0
x⁴(x²+6x+9)=0
x⁴(x+3)²=0
x=0 lub x=-3
Zad2 [zał.]