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stosuje się wzory :
(a + b)² = a² + 2*a*b + b²
(a -b)² = a² -2*a*b + b²
a² - b² = (a - b)( a +b)
Powodzenia!
(2 + x)²= 4 + 4x +x²
(2x + 2y)²= 4x² + 8xy + 4y²
(x - y)²= x² -2xy + y²
(a + b)(a - b)= a² - b²
(2x + 2y)2=4x²+8xy+4y²
(x - y)2=x²-2xy+y²
(a + b)(a - b)=a²-b²
(2x+ 2y)2= 4x + 4x2y +2y
(x-y)2= 2x-2xy+2y
(a+b)(a-b)= 2a - 2b