Question

simplify using suitable identity :(1.5+3) (1.5+-3)

Answer 1

Just identity

It's easy ;_+$((#)#;:*(#)?@+#+#()#!#+#(#))$!$+$8)#;#7#()@)?#!$(

Answer 2

Using identity (a+b)(a-b)

(1.5x+3)(1.5x-3)=(1.5)^-3^=2.25x^-9=3(0.75x^-3)=

0.75x^-3=0

X^=3/0.75=4

X^=4

X=2

(^means square of X)