Question

Rozwiąż równania:

a,b,c

Answer 1

A)
(x-1)² - (x+4)² = -2x +1
x² -2x +1 -( x² +8x +16) +2x -1 =0
x² -2x +1 -x² -8x -16 +2x -1 = 0
-8x -16 =0
-8x = 16
x = -2

b)
(x+5)²  - (x-3)² = x+1
x² +10x +25 -x²+6x-9 -x -1 = 0
15x = -15
x = -1

c)
(x+1)² + (x-3)(x+3) -2 = 2(x-1)²
x²+2x+ 1 + x² -9 -2 = 2(x²-2x+ 1)
2x²+2x-10 = 2x²-4x +2
6x = 12
x = 2