Question

(1.3)²-(0.7)²

solve the following​

Answer 1

1.2

Step-by-step explanation:

13x13 =169

and it has two multiply and decimal places so first it would be 1.69

and 7x7=49 so as mentioned above w=two d.p. = 0.49

finally 1.69-0.49=1.2

i.e. 1.3^2-0.7^2=1.2

Answer 2

Step-by-step explanation:

we know the algebraic expression

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

(0.7)2 - (0.3 )2

= ( 0.7+0.3) (0.7- 0.3)

= 1.0× 0.4

= 0.4

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