Question

(4-3a²) - (a²-7-20²) - (-2a²+11)​

Answer 1

Ответ:

=400-6 а² держи пожалуйста

Answer 2

Let's simplify the given expression step by step:

(4 - 3a²) - (a² - 7 - 20²) - (-2a² + 11)

First, let's simplify the terms inside each set of parentheses:

= 4 - 3a² - a² + 7 + 20² - (-2a² + 11)

Next, apply the distributive property to the last term by multiplying -1 to each term inside the parentheses:

= 4 - 3a² - a² + 7 + 400 + 2a² - 11

Now, let's combine like terms:

= (4 - 11) + (7 + 400) + (-3a² - a² + 2a²)

= -7 + 407 + (-2a²)

= 407 - 2a²

So, the simplified expression is 407 - 2a².