Разложите на множители: d(d−17)−10(17−d)
D(d – 17) – 10(17 – d) d(d – 17) – 10(– (d – 17)) d(d – 17) + 10(d – 17) (d – 17)(d + 10)
D(d-17)-10(17-d)=d(d-17)+10(d-17)=(d-17)(d+10)