Question

7.9×6.1 use algebraic identity
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Answer 1

Step-by-step explanation:

(7.9-6.1) (7.9+6.1)

1.8×14

25.2

Answer 2

Answer: 48.19

Step-by-step explanation:

We know,
(a + b) (a - b) = a² - b²

The given expression can we written as,
(7 + 0.9) (7 - 0.9) = 49 - 0.81 = 48.19