Question

Q3)- Simplify (2V5 - v2) (275+72)
(3 marks)
9:15 am​

Answer 1

Question:-

Simplify:

$(2 \sqrt{5} - \sqrt{2} )(2 \sqrt{5} + \sqrt{2} )$

Required Formula:-

$(a + b)(a - b) = {a}^{2} - {b}^{2}$

Solution:-

$(2 \sqrt{5} - \sqrt{2} )(2 \sqrt{5} + \sqrt{2} )$

$= ( {2 \sqrt{5} })^{2} - ( { \sqrt{2} })^{2}$

$= (4 \times 5) - (2)$

$= > 20 - 2 = 18$

Final Answer:-

= $18$