Question

Помогите найти значение выражения:(x+4)^2-(x-2)(x+2) при x=0,1a)-21; b)12;c)21;d)-12.

Answer 1

Раскроем скобки и упростим x^2+8x+16-x^2+4=8x+20
при х=0.1 получаем значение 20.8, можно округлить до 21

Answer 2

I can help you with your math problem. The correct answer is c) 21. Here is how you can solve it:

First, you need to simplify the expression by expanding the brackets and combining like terms. You will get:

$$(x+4)^2-(x-2)(x+2) = x^2+8x+16-x^2-4 = 8x+12$$

Next, you need to substitute x with 0.1 and evaluate the expression. You will get:

$$8(0.1)+12 = 0.8+12 = 12.8$$

Finally, you need to round the answer to the nearest integer. You will get:

$$\boxed{13}$$

I hope this helps you understand the problem better. If you have any other questions, feel free to ask me.Ответь+подробно.+Помогите+найти+значение+выражения:(x+4)^2-(x-2)(x+2)+при+x=0,1a)-21;+b)12;c)21;d)-12.