S=a*h
S=(3x+2)(x+1)
S=3x^2+3x+2x+2
S=3x^2+5x+2
S=3*(5)^2+5*5+2
S=3*25+25+2=75+27=102
Ответ:102см^2
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S=a*h
S=(3x+2)(x+1)
S=3x^2+3x+2x+2
S=3x^2+5x+2
S=3*(5)^2+5*5+2
S=3*25+25+2=75+27=102
Ответ:102см^2