(1)9x²-5=39x²=8x²=8/9x=±√(8/9)x=±2/3√2(2)4(x-1)²-8=0(x-1)²=2x-1=±√2x=1±√2(3)x²-6x+9=7(x-3)²=7x-3=±√7x=3±√7(4)9x²-6x+1=9(3x-1)²=93x-1=±33x=1±3...