Question

Expand ( x – 10 )
² using identity.​

Answer 1

Answer:

x² - 20x + 100

Step-by-step explanation:

We are using the algebraic identity (a - b)² = a² + b² - 2ab

(x - 10)²

= x² + 10² - (2 × x × 10)

= x² + 100 - 20x

= x² - 20x + 100

Some more formulae :

• (a + b)² = a² + b² + 2ab
• (a - b)² = a² + b² - 2ab
• (a + b) (a - b) = a² - b²

Thanks ! ☺️

Answer 2

Answer:

$\Large { { {x}^{2} + 100 - 20x}}$

Step-by-step explanation:

$\Large(x - 10)^{2}$

$\Large \green{ \boxed{ {x}^{2} + 100 - 20x}}$

Identity used -

$\Large (x - 10)^{2} = {x}^{2} + {y}^{2} - 2xy$