tavionjones tavionjones

26-05-2021
Mathematics

contestada

Which of the following expressions is equal to squared +25? O A. (x+5012 O B. (x-50 O C. (x + 10 (x-151) O D. (X - 5)(x+51)

Which of the following expressions is equal to squared 25 O A x5012 O B x50 O C x 10 x151 O D X 5x51 class=

Respuesta :

abidemiokin abidemiokin

31-05-2021

Answer:

(x-5i)(x+5i)

Step-by-step explanation:

Given the expression

(x-5i)²

Expand

(x-5i)(x+5i)

= x² - 5ix + 5ix - 25i²

= x² - 25i²

Since i² = -1, hence;

(x-5i)(x+5i) = x² - 25(-1)

(x-5i)(x+5i) = x² + 25

Hence the required expression is (x-5i)(x+5i)

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