Question

: (a - b)(a + b) =a? --b: -
(iii) (79)" - (69) (iv) 197 x 203
(vii) 1.8 x 2.2 (viii) 9.8 x 10.2​

Answer 1

Answer:

(a-b)(a+b)=a²-b²

Step-by-step explanation:

4). (200-3) (200+3).= (200)²-(-3)² = 400-9 = 391 Answers is 391