Evaluate, Using (A + B)(A - B)= A2 - B2. 15.9 X 16.1 - Mathematics

Evaluate, using (a + b)(a - b)= a² - b².
15.9 x 16.1

Sum

15.9 x 16.1
= (16 - 0.1) x (16 + 0.1)
= (16)² - (0.1)²
= 256 - 0.01
= 255.99.

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