(3x+2)^2+(4x+1)(4x-1)=(5x-1)^2

9x²+12x+4+16x²-1=25x²-10x+1 22x=-2 ⇒ x=-1/11

9х^2+12х+4+16х^2-1=25х^2-10х+1 22х=-2 х=-1,11