rozwąż zadanie a) 2(x+3)kwadrat-1=0
b)(17x-4)(x+512)=x+512
c)x do czwartej+3x do trzeciej+6x kwadrat=0
d)x do trzeciej-4xkwadrat+5x-20=0
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a) 2(x+3)²-1=0
2x²+12x+18-1=0
2x²+12x+17=0
Δ=144-8(17)=144-136=8
√Δ=2√2
x=-3+√2/2 lub x=-3-√2/2
b)(17x-4)(x+512)=x+512
(17x-4)(x+512)-x-512=0
(17x-4)(x+512)-1(x+512)=0
(17x-3)(x+512)=0
x=-512 lub x=3/17
c) x⁴+3x³+6x²=0
x⁴+3x³+3x²+3x²=0
x²(x²+3x+6)=0
Δ<0
x=0
d) x³-4x²+5x-20=0
x(x²+5)-4(x²+5)=0
(x-4)(x²+5)=0
Δ<0
x=4