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b) 3p(p - 2) = 3p^2 - 6p
c) -4a(-a + 5) = 4a^2 - 20a
2
b) a(a - b) - 2a(b - a) = a^2 - ab - 2ab + 2a^2 = 3a^2 - 3ab
c) s(-t + 1) - t(s - w + t) = -st + s - ts + tw - t^2 = - 2st + s + tw + t^2
3
b) 3s • (-2t)w - 4w • (-5)s + (-t) • 2s = -6stw + 20sw - 2st = - 2st - 6stw + 20sw
c) x • (-3) • (-y) - 2y • (-3xy) = 3xy -6xy^2 = -6xy^2 + 3xy
licze na naj, dlugo mi to zajelo hahaha