Oblicz wartość wrażenia:a) 7(5a-b)-3(2a-3b)=
b) 4x(y-3)+5y(3-10x)+(2x+5)(6-3y)=
a) 35a - 7b - (6a - 9b) = 35a - 7b - 6a + 9b = 29a + 2b
b) 4xy - 12x + 15y - 50xy + 12x - 6xy + 30 -15y = -52xy + 30
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a) 35a - 7b - (6a - 9b) = 35a - 7b - 6a + 9b = 29a + 2b
b) 4xy - 12x + 15y - 50xy + 12x - 6xy + 30 -15y = -52xy + 30