Question

Evaluate (85)2 - (75)2 by using suitable identity.​

Answer 1

Answer:

(85)2 -(75)2

(85 + 75)(85 -75)

160 *10

=1600

Step-by-step explanation:

using the identity ,

(a)2-(b)2 = (a+b)(a-b)

Answer 2

Answer:

(a+b) (a-b)= a²- b²

(85+75) (85-75)= 160X10=1600