Rozwiąż równania (II klasa gimnazjum)
b) (x - 4)P - 1 = (x - 3)(x - 2)
c) (x - 2)P - x(x - 4) = 4(x - 3)
d) (x - 9)(x - 5) = xP + 56 - 14x
e) xP - (x + 3)(x + 4) = x + 20
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(x-4)²-1=(x-3)(x-2)
x²-8x+16-1=x²-2x-3x+6
-3x=-9\(-3)
x=3
c)
(x-2)²-x(x-4)=4(x-3)
x²-4x+4-x²+4x=4x-12
-4x=-16\(-4)
x=4
d)
(x-9)(x-5)=x²+56-14x
x²-5x-9x+45=x²+56-14x
0=11 równanie sprzeczne
e)
x²-(x+3)(x+4)=x+20
x²-x²-4x-3x-12=x+20
-8x=32\8
x=-4
Mam nadzieję że P to jest do potęgi
b) (x - 4) do potegi 2 - 1 = (x-3)(x-2)
x do kwadratu - 4x - 4x + 16 - 1 = x do kwadratu - 2x - 3x + 6
x do kwadratu - 8x + 15 = x do kwadratu - 5x + 6
3x = 9
x = 3
c) (x - 2) do kwadratu - x(x - 4) = 4(x - 3)
x do kwadratu - 2x - 2x +4 - x do kwadratu + 4x = 4x - 12
4 = 4x - 12
-4x = -16
x = 4
d) (x - 9)(x - 5) = x do kwadratu + 56 - 14 x
x do kwadratu - 5x - 9x + 45 = x do kwadratu + 56 - 14x
-14x + 45 = 56 - 14x
0 = 11
rownanie sprzeczne
e) x do kwadratu - (x + 3)(x +4) = x + 20
x do kwadratu - (x do kwadratu + 4x + 3x + 12) = x + 20
x do kwadratu - x do kwadratu - 4x - 3x - 12 = x + 20
-8x = 32
x = -4