Question

Factorise using identity x^4+14x^2+49

Answer 1

Answer:

(x^2 + 7)^2.

Step-by-step explanation:

x^4 + 14x^2 + 49

= (x^2)^2 + 2 ☓ x^2 ☓ 7 + 7^2

= (x^2 + 7)^2 or (x^+7) (x^2 + 7).

✔️ Identity used:

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