Simplify the following expression
(3+√5) (3-√5)
Answers
Answered by
4
Answer:
(3+√5) (3-√5)
= 3^2 -√5^2
= 9-5
= 4
Answered by
36
GIVEn
Simplify the following expression
(3+√5) (3-√5)
SOLUTIOn
→ (3 + √5)(3 - √5)
Applying identity :
a² - b² = (a + b)(a - b)
→ (3)² - (√5)²
→ 9 - 5
→ 4
SOMe IDENTITIEs
- (a + b)² = a² + b² + 2ab
- (a - b)² = a² + b² - 2ab
- a³ - b³ = (a - b)(a² + ab + b²)
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