Question

(2x-1)^2 - (x-1) (x+1)​

Answer 1

Answer:

-2x+2

Step-by-step explanation:

2x+1-4x-x2+x-x+1

-2x+2

Answer 2

Answer:

(2x-1)² - (x-1) (x+1)

Answer: 4x² - 4x + 1 - (x² - 1)

4x² - 4x + 1- x²-1

3x² - 4x + 2

Explanation:

• First (2x-1)² you can expand it by using (a-b)² = a² - 2ab + b².
• (x-1)(x+l) can be factorised using (a-b)(a+) = a²-b².
• Next, expand and factories accordingly...
• you will get .. 4x² - 4x + 1 - (x² - 1)

Got it?

• Now open the brackets, and it will be like this.. 4x² - 4x + 1 - x² + 1.
• Now, group and add/subtract the like terms... you will get 3x² - 4x + 2.

Hope you understood now! It's pretty simple!