Question

rozwiaz równanie.. to nawiasie to potega

a) 4x(5)+3x(4)-x(3)=0

b)x(3)-9x(2)+2x-18=0

Answer 1

a) 4x⁵+3x⁴-x³=0

x³(4x²+3x-1)=0

Δ=9+16=25

x₁=-3-5/8=-1

x₂=-3+5/8=1/4

x=0 v x=-1 v x=1/4

 

b)x³-9x²+2x-18=0

x²(x-9)+2(x-9)=0

(x-9)(x²+2)=0

x=9