Question

А) 2,5(6х-4)+3(х-3)-8(1-4х); б) 5а(а2-4а)-8а(а2-6) розкрити дужки,подібні доданки підкреслити і звести.

Answer 1

Ответ:

а) 50х-27

б)-26а²+48а

Объяснение:

а) 15х-10+3х-9-8+32х= 50х-27

б) 5а(2а-4а)-8а(2а-6)= 5а (-2а)-16а²+48а= -10а²-16а²+48а= -26а²+48а

Answer 2

А) Let's simplify the expression step by step:

2.5(6x - 4) + 3(x - 3) - 8(1 - 4x)

Start by distributing the coefficients:

= 2.5 * 6x - 2.5 * 4 + 3 * x - 3 * 3 - 8 * 1 + 8 * 4x

= 15x - 10 + 3x - 9 - 8 + 32x

Now, combine like terms:

= (15x + 3x + 32x) + (-10 - 9 - 8)

= 50x - 27

So the simplified expression is 50x - 27.

Б) Let's simplify the expression step by step:

5a(a^2 - 4a) - 8a(a^2 - 6)

Start by distributing the coefficients:

= 5a * a^2 - 5a * 4a - 8a * a^2 + 8a * 6

= 5a^3 - 20a^2 - 8a^3 + 48a

Now, combine like terms:

= (5a^3 - 8a^3) + (-20a^2 + 48a)

= -3a^3 + 28a

So the simplified expression is -3a^3 + 28a.