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LOLOHA321
@LOLOHA321
August 2022
1
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Помогите пж
Упростите выражение: 2а(а + в – с) – 2в(а –в – с) + 2с(а – в + с)
Найдите значение выражения: 3а (b+3) + с (b+3), при а = - 0,2; b = 1,03; с = 1,6
Разложите на множители:
А) 7(y–3) – 5a(3– y) Б) 6n (m – 2) + b(2– m)
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litanalove
1.
2a²+2ab-2ac-2ab+2b²+2bc+2ac-2bc+2c²=
=2(a²+b²+c²)
2. 3a(b+3)+c(b+3)=(b+3)(3a+c)=(1.03+3)(3*(-0.2)+1.6)=
=4.03
3. a) 7(y-3)+5a(y-3)=(y-3)(7+5a)
b) 6n(m-2)-b(m-2)=(m-2)(6n-b);;;-5a(3-y)=+5a(y-3); +b(2-m)= -b(m-2)
3 votes
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Answers & Comments
2a²+2ab-2ac-2ab+2b²+2bc+2ac-2bc+2c²=
=2(a²+b²+c²)
2. 3a(b+3)+c(b+3)=(b+3)(3a+c)=(1.03+3)(3*(-0.2)+1.6)=
=4.03
3. a) 7(y-3)+5a(y-3)=(y-3)(7+5a)
b) 6n(m-2)-b(m-2)=(m-2)(6n-b);;;-5a(3-y)=+5a(y-3); +b(2-m)= -b(m-2)