Question

(99.9)^2 - (0.1)^2 please someone help me

Answer 1

Answer:

Step-by-step explanation:

(99.9)^2 - (0.1)^2

Let 99.9=x and 0.1=y

x²-y³

(x+y)(x-y)

put value of x and y

(99.9+0.1)(99.9-0.1)

=100*99.8

=100*998/10

=10*998

=9980

Answer 2

Let 99.9 be x and 0.1 be y,

We know that,

x² - y²

= (x+y) (x-y)

Putting values,

= (99.9+0.1) (99.9-0.1)

= 100 × 99.8

= 9980

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