\(a,\left(3x+2\right)^2-\left(3x-2\right)^2=5x+38\)
\(\Leftrightarrow9x^2+12x+4-9x^2+12x-4-5x-38=0\)
\(\Leftrightarrow19x=38\)
\(\Leftrightarrow x=2\)
\(b,3\left(x-2\right)^2+9\left(x-1\right)=3\left(x^2+x-3\right)\)
\(\Leftrightarrow3\left(x^2-4x+4\right)+9x-9=3x^2+3x-9\)
\(\Leftrightarrow3x^2-12x+12+9x-9-3x^2-3x+9=0\)
\(\Leftrightarrow-6x=-12\)
\(\Leftrightarrow x=2\)
\(a,\left(3x+2\right)^2-\left(3x-2\right)^2=5x+38\\ =>\left(3x+2-3x+2\right)\left(3x+2+3x-2\right)=5x+38\\ =>4.6x-5x=38\\ =>24x-5x=38\\ =>19x=38\\ =>x=2\\ b,3\left(x-2\right)^2+9\left(x-1\right)=3\left(x^2+x-3\right)\\ =>3\left(x^2-4x+4\right)+9x-9=3x^2+3x-9\\ =>3x^2-12x+12+9x-9-3x^2-3x+9=0\\ =>-6x+12=0\\ =>-6x=-12\\ =>x=2\)
