Question

(6.4)²-(5.4)²/(8.9)²+(8.9)x(2.2)+(1.1)²​

Answer 1

Answer:

(6.4)2-(5.4)2 / (8.9)2 ×(2.2)+(1.1)2

using the relation

a2-b2=(a-b)(a+b)

and

(a+b)2=a2+b2+2×a×b

(6.4 -5.4)(6.4+5.4) /(8.9+1.1)2

1×11.8 /(10)2

11.8 / 100