Question

(2a square +9)(2a square-7)​

Answer 1

(2a²+9) (2a²-7) formula =

(x+a)(x+b)=x²+(a+b)x+ab

x =2a² a= 9 b= -7

answer is (2a²)²+(9-7)2a²+9×-7

4a⁴+(2)2a²+(-63)

4a⁴+4a²-63

hope it helps to you mark it brain