Question

(5.3)2 – (3.3)2
(11.2)2-(11.2) (2.4)+(1.2)​

Answer 1

Answer:

Step-by-step explanation:

(5.3)^2 - (3.3)^2 / (11.2)^2 -(11.2) × (2.4) + (1.2)

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

= (5.3+3.3)(5.3-3.3) / (11.2)^2 -(11.2)×(2.4)+ (1.2)^2

= (8.6×2) / (11.2)^2- 11.2× (2.4) + (1.2)^2

Since (a-b)^2 = a^2 -2ab + b^2

= 17.2 / (11.2)^2 - 2(11.2 ×1.2) + (1.2)^2

=17.2 / (11.2 - 1.2)^2

=17.2 / (10)^2

=17.2 / 100

=172/1000

=0.172( answer)

Hope it helps!

Answer 2

Answer:

5.3= a, 3.3=b a²-b² formula

11.2=c, 2.4=2*1.2 & 1.2=d c²-2cd+d² formula