Question

Why does 4-4x2+8=4? Explain please!

Answer 1

Below

Explanation:

According to PEMDAS, in a complex question, you solve in the following order:

Parenthesis content

Exponent content

Multiplication/Division

Addition/Subtraction

So in this question, you would solve the multiplication first because it takes priority.

4 * 2 = 8

So you can rearrange the equation to:

4 + (- 8) + 8 = 4

A subtraction symbol is essentially setting the next number or group to negative, and adding that.

4 - 8 = 4 + (-8)

which are both equal to -4.

It doesn't matter what order you do the following:

4 - 8 = -4

-4 + 8 = 4

or

-8 + 8 = 0

4 + 0 = 4

Answer 2

Answer: 4

Explanation:

The given expression is 4 - 4x2 + 8.

To solve this expression, we need to follow the order of operations, which is also known as PEMDAS. PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

Let's break down the expression step by step:

1. There are no parentheses in the expression.

2. There are no exponents in the expression.

3. Next, we need to perform multiplication and division from left to right. In this case, we have 4 multiplied by 2, which equals 8. So, the expression becomes:

4 - 8 + 8

4. Finally, we perform addition and subtraction from left to right. Here, we subtract 8 from 4 and then add 8 to the result:

4 - 8 + 8 = -4 + 8 = 4

Therefore, the expression 4 - 4x2 + 8 simplifies to 4.

Hope this helps.