Question

$(x + y) {2} - (x - y) {2}$
answer the question​

Answer 1

Answer:

${(x + y)}^{2} - {(x - y)}^{2} \\ \\ = {x}^{2} + {y}^{2} + 2xy - {x}^{2} - {y}^{2} + 2xy \\ \\ = 4xy$

Answer 2

Question

(x + y)² - (x - y)²

Solution

• ⇒(x + y)² - (x - y)²
• ⇒x² + 2xy + y² - x² + 2xy - y²
• ⇒2xy + 2xy
• ⇒4xy Ans

Formula used:

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