9х(х+6)-(3х+1)^2=2
9x^2+54x-9x^2-6x-1=2
48x=3
x=3/48=1/16
3(х+5)^2-4х^2= (2-х)(2+х)
3(x^2+10x+25)-4x^2=4-x^2
3x^2+30x+75-4x^2-4+x^2=0
30x=-71
x=-71/30= - 2 11/30
9х(х+6)-(3х+1)^2=2
9x^2+54x-9x^2-6x-1=2
48x=3
x=3/48=1/16
3(х+5)^2-4х^2= (2-х)(2+х)
3(x^2+10x+25)-4x^2=4-x^2
3x^2+30x+75-4x^2-4+x^2=0
30x=-71
x=-71/30= - 2 11/30