zamien sume na iloczyn,grupujac najpierw odpowiednio wyrazy.
a)2ax+xb-2a-b b)ax-ay-bx+by
a)2ax+xb-2a-b = x(2a + b) - (2a + b) = (2a +b)(x - 1)
b)ax-ay-bx+by = a(x - y) - b(x - y) = (x - y)(a - b)
a)
2ax-2a+xb-b=
2a(x-1)
b(x-1)
b)ax-ay-bx+by=
a(x-y)
b(-x-y)
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a)2ax+xb-2a-b = x(2a + b) - (2a + b) = (2a +b)(x - 1)
b)ax-ay-bx+by = a(x - y) - b(x - y) = (x - y)(a - b)
a)
2ax-2a+xb-b=
2a(x-1)
b(x-1)
b)ax-ay-bx+by=
a(x-y)
b(-x-y)