mialynakuma16 mialynakuma16

06-02-2018
Mathematics

contestada

Which expression is equal to 7√28-5√63
A:-√7
B:-37√7
C:-11√7
D:√7

Respuesta :

zrh2sfo zrh2sfo

06-02-2018

The Answer is A: -√7

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Аноним Аноним

06-02-2018

sqrt 28 = 2 sqrt7
and sqrt 63 = 3 sqrt7
so answer is 14 sqrt7 - 15 sqrt 7

= - sqrt 7

Its A

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