Question

упростите (a - 10)^2 - (a-5) (a * 5) даю 15 баллов

Answer 1

$(a-10)^{2} - (a-5)(a*5) = (a^{2} -20a + 100) -(a-5) (5a) = (a^{2} -20a + 100) - (5a^{2}-25a) = a^{2} -20a + 100-5a^{2}+25a = -4a^{2}+5a+100$

Answer 2

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