(3х+2)^2+(4х+1)(4х-1)=(5х-1)^2

( 3х + 2 )^2 + ( 4х + 1 )( 4х - 1 ) = ( 5х - 1 )^2
9х^2 + 12х + 4 + 16х^2 - 1 = 25х^2 - 10х + 1
25х^2 + 12х + 3 = 25х^2 - 10х + 1
12х + 10х = 1 - 3
22х = - 2
Х = - 1/11
Ответ ( - 1/11 )