mattricc1323 mattricc1323

24-07-2018
Mathematics

contestada

what are the factors of x^2-25

A. (x-5)(x-5)
B. (x+5)(x-5)
C. (x-1)(x+25)
D. Prime

Respuesta :

choixongdong choixongdong

24-07-2018

a^2 - b^2 = (a + b)(a - b)

so

x^2 - 25

= x^2 - 5^2

= (x + 5)(x - 5)

Answer is B. (x + 5)(x - 5)

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