Question

Помогитее:с 1)(2а2 - За + 1) - (7а2 - 5а) 2) - (7а2 - 5а); б) 3х (4х2 - х) Нужно решить:с

Answer 1

(2а^2-3а+1)-(7а^2-5а)= 2а^2-3а+1-7а^2+5а=-5а^2+2а+1

Answer 2

(2a^2 - 3a + 1) - (7a^2 - 5a) = 2a^2 - 3a + 1 - 7a^2 + 5a (Distribute the negative sign) = -5a^2 + 2a + 1 (Combine like terms)

So the simplified expression is -5a^2 + 2a + 1.

• (7a^2 - 5a) = -7a^2 + 5a (Distribute the negative sign)

So the simplified expression is -7a^2 + 5a.

б) 3x (4x^2 - x) = 3x * 4x^2 - 3x * x (Distribute the 3x) = 12x^3 - 3x^2 (Simplify by multiplying)

So the simplified expression is 12x^3 - 3x^2.