F(x)= (6x²+5)3 f(x)=(6x²+5)²+(6x²+5 f(x)=(6x²)²+5²+2*6x²*5+(6x²+5 f(x)=36x²*²+25+60x²+6x²+5 f(x)=6x4+66x²+30 f'(x)=(4*6)x3+123x f'(x)=24x3+123x hada lhale maraniche matakda menah