Question

$(4 \sqrt{3} - 3 \sqrt{5} {)}^{2}$

Answer 1

We know,
(a - b)² = a² + b² - 2ab


Applying formula,


(4√3 - 3√5)²

(4√3)² + (3√5)² - 2(4√3)(3√5)

(16×3) + (9×5) - 2(12√15)

48 + 45 - 24√15

93 - 24√15





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I hope this will help you



(-:

Answer 2

Using identity
(a-b) ^2
48+45-24root 15
813-24 root 15