Question

Simplify the following
(a) (2+√5) (2−√5)
(b) (√3+ √ )2+ (√3–√ )2

Answer 1

Answer:

$(2 + \sqrt{5} )(2 - \sqrt{5} ) \\ (2) {}^{2} - ( \sqrt{5} ) {}^{2} \\ 4 - 5 = - 1$

$( \sqrt{3} + \sqrt{2} )( \sqrt{3 } - \sqrt{2} ) \\ ( \sqrt{3} ) {}^{2} - ( \sqrt{2} ) {}^{2} \\ 3 - 2 = 1$

marks the brainlist☺❤

Answer 2

refer the above pictures, hope this helps you mark as the Brainliest,thanks