policz wyrazenia 3a+2b do:
a) a=1 i b=2
b) a=2 i b=1
c) a=3 i b=7
d)a=8 i b=0
rozwin karzdy produkt:
a) 7x (a+b)
b) 2x (x-y)
c) (4+x) x3
d) c x (3-b)
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3a+2b = 3+4 = 7
3a+2b= 6+2 = 8
3a+2b = 9+14 = 23
3a+2b= 24 + 0 =24
a) 7x (a+b) = 7ax + 7bx
b) 2x (x-y) = 2x^2 - 2xy
c) (4+x) x3 = 12x+3x^2
d) c x (3-b) = 3cx-bcx