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41 votes
41 votes
PLEASE ANSWER ASAP
expand and simplify the following:
a) (√6+√3)(√6-√3) b)(√5-√2)(√2+√5)

User Gregory Seront
by
2.9k points

2 Answers

12 votes
12 votes

Answer:

(6-3)(5-2)=3×3=9

Explanation:


x ^(2) - {y}^(2) = (x - y)(x + y)


( √(6) - √(3) )( √(6) + √(3) ) = ( { √(6) }^(2) - { √(3) }^(2) ) = 6 - 3 = 3

User Akash Dubey
by
3.0k points
19 votes
19 votes

Answer:


{ \bf{a).}} \\ { \tt{( √(6) + √(3) )( √(6) - √(3)) }} \\ { \tt{ = ( { √(6) )}^(2) - {( √(3)) }^(2) }} \\ { \tt{ = 6 - 3}} \\ { \tt{ = 3}} \\ \\ { \bf{b).}} \\ { \tt{( √(5) - √(2))( √(2) + √(5) )}} \\ { \tt{ = ( { √(5) }^(2)) - { (√(2) }^(2)) }} \\ { \tt{ = 5 - 2}} \\ { \tt{ = 3}}

User Matthew Cornelisse
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3.3k points