Nyah151 Nyah151

05-09-2018
Mathematics

contestada

Which is a correct factorization of 391?

A.(20 - 3)2
B.(20 - 3)(20 + 3)
C.(20 - 9)(20 + 9)
D.(20 + 3)2

Respuesta :

Shaikha0anf Shaikha0anf

05-09-2018

The answer is option B.

Because (20 - 3) (20 + 3)

= (20)^2 - 3^2

=400 - 9

=391.

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syahidah syahidah

05-09-2018

the answer is c
(20x20)+(20x9)-(9x20)-(9x9)
=391

Answer Link

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