Question

expand to simplify.....​

Answer 1

Answer:

hey mate your answer is...

Step-by-step explanation:

$(a + b) {}^{2} - (a - b) {}^{2} \\ = 2a \times ( - 2b) \\ = - 4ab. \\ hope \: its \: helps....$

Answer 2

ii) (a+b)² - (a-b)² = (a+b+a-b) (a+b-a+b) = (a+a) (b+b) = (2a) (2b) = 4ab

iii) (a+b)²-(a+b)(a-b) = (a+b)[(a+b)-(a-b)] = (a+b) [a+b-a+b] = (a+b) (2b) = 2b (a+b)