Zapisz w postaci jak najprostrzych sum algebraicznych: a) 5x(do kwadratu)-2x-4x(do kw.)+5-x(do kw)+x
b) 5(4a-3b)-6(5-3a+2b)
c) (2-a)(3a+4)-8
d) (6-3x)(4x-6)-5x(3x+2)
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a) 5x(do kwadratu)-2x-4x(do kw.)+5-x(do kw)+x = 5x² - 4x² - x² - 2x + x + 5 = -x + 5
b) 5(4a-3b)-6(5-3a+2b) = 20a - 15b - 30 + 18a - 12b = 38a - 27b - 30
c) (2-a)(3a+4)-8 = 6a + 8 - 3a² - 4a - 8 = -3a² + 2a
d) (6-3x)(4x-6)-5x(3x+2) = 24x - 36 - 12x² + 18x - 15x² - 10x = 32x - 36 - 27x²