Please show me how to simplify the following:
(2+√5)(5-√20)
(2+√5)(5-√20)
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expand the brackets:
10-2√20+5√5-10
simplify:
10-10-2√20+5√5
-2√20+5√5
breakdown √20 into √4√5 then 2√5
-2(2√5)+5√5
-4√5+5√5
and therefore the answer is √5
hope thats right!
10-2√20+5√5-10
simplify:
10-10-2√20+5√5
-2√20+5√5
breakdown √20 into √4√5 then 2√5
-2(2√5)+5√5
-4√5+5√5
and therefore the answer is √5
hope thats right!
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Hi,
(2+√5)(5-√20) =
10 - 2√20 + 5√5 - √100 =
10 - 4√5 + 5√5 - 10 = √5 <==ANSWER
I hope that helps!! :-)
(2+√5)(5-√20) =
10 - 2√20 + 5√5 - √100 =
10 - 4√5 + 5√5 - 10 = √5 <==ANSWER
I hope that helps!! :-)
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(2 + √5)(5 - √20)
= (2+√5)(5 - √(4*5))
= (2 + √5)(5 - 2√5 )
= 10 - 4√5 + 5√5 - 10
= √5
= (2+√5)(5 - √(4*5))
= (2 + √5)(5 - 2√5 )
= 10 - 4√5 + 5√5 - 10
= √5
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(2+√5)(5-√20)
= 10-2√20+5√5-√100
= 10-4√5+5√5-10
= -4√5+5√5
=√5
= 10-2√20+5√5-√100
= 10-4√5+5√5-10
= -4√5+5√5
=√5