Question

(x+a)(x+b)=x2+(a+b)x+ab find the following product( 2m2+9)(2m2-4)​

Answer 1

(2m^2+9) (2m^2-4)

(2m^2)^2 +(9-4)2m^2 +(9)(-4)

4m^4+10m^2-36

Answer 2

Answer:

[2m^2+9]  [2m^2-4]

x=2m^2

a=9

b=-4

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

                              =[2m^2]^2+[9+{-4}]2m^2+9*-4

                              =4m^4+[9-4]+2m^2-36

                             =4m^4+6+2m^2-36

                              =4m^4+2m^2-36+6

                             =  4m^4+2m^2-30 [answer]

hope it helps

tq......///////