Question

Упростите выражение (х – 1)^2– (х + 3)(х – 3)

Answer 1

(x-1)²-(x+3)(x-3) = x²-2x+1-x²+9 = 10-2x

Answer 2

Ответ:

x²+1-2x-(x²-9)= x²+1-2x-x²+9 = -2x +10 = -2(x-5)