Exercitiul 5 va rog ..

1. x- _1_
= 7 (x- _1_ )² = 7
²
x x
________________
( x- _1_) ( x- _1_ ) = 49
x² + _1_ + 3= ? x x
x²
x² - _x_ - _ x_ + _ 1_ = 49
x x
x²
x² -1 - 1 + _1_ = 49
x²
x² - 2 + _ 1_ = 49
x²
x²+ _1_ = 49+ 2
x²
x²+ _1_ = 51
x²
x²+ _1_ + 3 =
x²
51+ 3
54