Please answer this maths questions fast.
Factorise:-
a^3-0.064
Answers
Answered by
24
Given
Factories it
a³ - 0.064
Solution
→ a³ - 0.064
★ Applying identity :
a³ - b³ = (a - b)(a² + ab + b²)
→ (a)³ - (0.4)³
→ (a - 0.4)[(a)² - a×0.4 - (0.4)²]
→ (a - 0.4)[a² - 0.4a - 0.16]
Some identities
- (a + b)² = a² + b² + 2ab
- (a - b)² = a² + b² - 2ab
- a² - b² = (a + b)(a - b)
- a³ + b³ = (a + b)(a² - ab + b²)
- (a + b)³ = a³ + b³ + 3ab(a + b)
- (a - b)³ = a³ - b³ - 3ab(a - b)
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