2+(x-4)(x+4)=(x-1)^2 4(x+7)(x+6)-(2x+3)^2+1=0 1/2y+2y+1/5-y-1/3(1-y)=8-3y/6 x-3/2=6x-3/5

2+(x-4)(x+4)=(x-1)^2 2+x²-16=x²-2x+1 -14-1=-2x 2x=15 x=7,7 4(x+7)(x+6)-(2x+3)^2+1=0 4*(x²+6x+7x+42)-(4x²+12x+9)+1=0 4x²+52x+168-4x²-12x-9+1=0 40x=-160 x=-40 x-3/2=6x-3/5 /*(10) 10x-15=60x-6 -50x=9 x=-9/50