simplify(square root 5+2)(square root 5-20)
adamsyakir:
that (√5-2) or √(5-2)?
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√(5+2)×√(5-20)=√(5+2)(5-20)
=√5(5-20)+2(5-20)
=√(25-100+10-40)
=√35-140
=√-105
it is not possible .so,the given question is wrong
=√5(5-20)+2(5-20)
=√(25-100+10-40)
=√35-140
=√-105
it is not possible .so,the given question is wrong
if it is (square root of 5-2) then the answer is 21
√-105 ?
thank you for correcting me.
but,this answer impossible ,√-105 =error
yes , it is impossible.so,i think the correct question is (square root 5-2) only. may be there is a typing mistake.
but,in the question ,(√5+2).(√5-20) or √(5+2).√(5-20)?? ,
i think so it is (square root 5+2).(square 5-2) is the correct answer.
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