Odpowiedzi

2010-04-14T23:08:07+02:00
X^3+x^2-9x-9=0
x² (x +1) -9 (x + 1) = 0
(x +1)(x²-9) = 0
(x+1)(x-3)(x+3) = 0
(x+1) = 0 (x-3) =0 (x+3) = 0
x= -1 x=3 x=-3


5x^4+6x^3+x^2=0
5x⁴+5x³ + x³+x²=0
5x³(x+1) +x²(x+1) = 0
(x+1)(5x³+x²) = 0
(x+1)x²(5x+1) = 0
x = -1 x = 0 x = -1/5

tak jakos powinno być


2. a b ____________ a +0,2a b + 0,2b

ab = P₁ ______ (a +0,2a)(b + 0,2b)=P₂

P₂ = 1,2a * 1,2b
1,2 * 1,2 = 1,44
1,44 *100% = 144

o 144%?

1 5 1