Question

using suitable identities( 3 X + 5 )(3 X + 5)​

Answer 1

Answer:

(3x+5)(3x+5).

It is in the form of (x+a)(x+b)=x²+(a+b)x+ab where x=3x, a=5 & b=5.

(3x+5)(3x+5)=(3x)²+(5+5)(3x)+(5)(5).

=9x²+10(3x)+25.

=9x²+30x+25.

(or).

(3x+5)².

It is in form of (a+b)²=a²+2ab+b² where a=x & b=5.

(3x+5)²=(3x)²+2(3x)(5)+(5)².

=9x²+30x+25.

I think this is your answer.