Question

Записать в стандартном виде (a-2)(2+a)-2(a^2-a)

Answer 1

-а^2-4+2 а

первая и вторая скобка это формула а^2-в^2

Answer 2

To simplify the expression and write it in standard form, let's follow these steps:

Step 1: Expand the given expression. Step 2: Combine like terms. Step 3: Write the expression in standard form (descending order of exponents).

Given expression: (a-2)(2+a) - 2(a^2 - a)

Step 1: Expand the given expression (a-2)(2+a) expands to: a * 2 + a * a - 2 * 2 - 2 * a = 2a + a^2 - 4 - 2a

Step 2: Combine like terms In the expanded expression, the terms "2a" and "-2a" cancel each other out, leaving us with: a^2 - 4

Step 3: Write the expression in standard form The standard form requires writing the terms in descending order of exponents. In this case, we only have one term: a^2 - 4

So, the expression (a-2)(2+a) - 2(a^2 - a) in standard form is: a^2 - 4.