Question

Solve the by using identity
(ra2​

Answer 1

Step-by-step explanation:

(2a^2+9)(2a^2+5)

[(x+a)(x+b)=x^2+x(a+b)+ab]

(2a^2+9)(2a^2+5)=(2a^2)^2+a^2(10+18)+9×5

(2a^2+9)(2a^2+5)=4a^4+28a^2+35