Question

simplify (root 4 +3 root 5) (root 4 - 3 root 5)​

Answer 1

Step-by-step explanation:

( √4 + 3√5 ) ( √4 - 3√5 )

(√4)² - (3√5)²

4 - 9*5

4 - 45

= -41

Answer 2

Answer:

-41

Step-by-step explanation:

Use (a+b)(a-b) = a^2-b^2 formula

(√4+3√5)(√4-3√5) = 4- 9*5 = 4-45 = -41

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