What is the completely factored form of this polynomial? X^4-8x^2+16
O A. (x + 2)2(x - 2)2
O B. (x² - 4)2
OC. (x2 + 4)(x + 2)(x - 2)
OD.(x + 2)(x - 2)

a

b

d

step-by-step explanation:

so, converting firstly the mixed fractions to improper fractions and then "adding".

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

the answer is c

step-by-step explanation: i took a test with this question on it