Question

Is (-a + b)² = a² - 2ab + b² right or wrong, and why?

Answer 1

`\huge\boxed{\sf Right.}`

Explanation:

`(-a+b)^2`

Let's apply the formula (x+y)² = x² + 2xy + y²

Here, x = -a and y = b

So,

= (-a)² + 2(-a)(b) + (b)²

= a² - 2ab + b²

Hence, it has been proved that (-a + b)² = a² - 2ab + b².

`\rule[225]{225}{2}`

Hope this helped!

~AH1807