(9x-5)(x+5) = (x – 3)² + 29x^2+45x-5x-25=x^2-6x+119x^2+40x-25-x^2+6x-11=08x^2+46x-36=0D=2116+1152=3268x1=-46-sqrt(3268)/16x1=-46+sqrt(3268)/16