Question

СРОЧНО!!!
Решите уравнения:
а) х^2-(х-5)^2 = 10
б) (х-3) (х+1) = (х-2)^2

Answer 1

1)  x^2 -  (x^2 - 10x + 25) = 10;  x^2 - x^2 +10x - 25 = 10

10x - 25 =10; 10x = 35; x=3,5

2) x^2 + x - 3x - 3 = x^2 - 4x + 4; x - 3x + 4x = 4+3

2x = 7; x = 3,5