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b) (a +2b)2= 2a + 4b
c) (3x+5y)2= 6x + 10y
d) (4x +⅔y)2= 8x+ 1⅓y
e) (⅓ +5b)2= ⅔+ 10b
a16x²+16x+4
b a²+4ab+4b²
c 9x²+30xy+25y²
d 16x²+16/3+4/9y²
e 1/4+5b+25b²
b) (a + 2b)² = a² + 4ab + b²
c) (3x + 5y)² = 9x² + 30xy + 25y²
d) (4x + ⅔y)² = 16x² + 5⅓xy + ⁴/₉y²
e) (½ + 5b)² = ¼ + 5b + 25b²
Chyba tak :-)