Question

number system formulas pls
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Answer 1

Answer:

Formulas for Number System and Basic Concept

(a – b)(a + b) = (a² – b²).

(a + b)² = (a² + b² + 2ab)

(a – b)² = (a² + b² – 2ab)

(a + b + c)² = a² + b² + c² + 2(ab + bc + ca)

(a³ + b³) = (a + b)(a² – ab + b²)

(a³ – b³) = (a – b)(a² + ab + b²)

(a³ + b³ + c³ – 3abc) = (a + b + c)(a² + b² + c² – ab – bc – ac)