Question

(ii) (x2 - 5x + 7) (x2 - 5x - 7) Express each of the following as difference of two squares ​

Answer 1

Answer:

(x2 - 5x)^2 - 7^2

Step-by-step explanation:

(x2 - 5x + 7)= (A + B) where A = x2 - 5x and B = 7

(x2 - 5x - 7)= (A - B) Where A = x2-5x and B = 7

multiplying (A + B) and (A - B)

we get formula (A + B)(A - B)= A^2 - B^2

therefor ans :

(x2 - 5x)^2 - (7)^2