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wyrazenie 2a - (3a +1) + (a -5) jest rowne: -6
-3x(5x-2)=-15x²+6x
2. -15x² + 6x
3. x razy x = x²
(x+1) razy ( x+1) =x²+x+x+1 = x² + 2x + 1
Pole kwadratu zwiekszylo sie o 2x i 1
2. -3x(5x-2)= -15x² +6x
3.
bok kwadratu= x+1
P= (x+1)²= (x+1)(x+1)= x² + 2x+ 1
A więc pole wzrośnie o 2x+ 1