a) x²-(x+3)(x+4)=x+20
b) (x-1)(x+1)-x(x+2)-1=2(x+1)
c) 4(x+2)² = (2x-1)(2x+1)-2(2x-1)
Bardzo ale to bardzo bym prosił o rozwiązanie tych działań na dzisiaj.
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a)
x^2 - (x^2 + 4x + 3x + 12) = x + 20
x^2- x^2 - 4x - 3x - 12 = x + 20
-7x - 12 = x +20
-6x = 32
x = - 5 i 1/3
b)
x^2 + x - x - 1 - x^2 - 2x - 1 = 2x + 2
-2x - 2 = 2x + 2
-4x = 4
x = -1
c)
4(x^2 + 4x + 4) = 4x^2 - 1 - 4x +2
4x^2 + 16x +16 = 4x^2 - 4x + 1
20x = -15
x = -(3/4)