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