Question

(x-3)²-(x+5)(x-5)
При x = 1 ⅚

Answer 1

Ответ:

(x-3)²-(x+5)(x-5)=(x-3)²-(x²-5²)=x²-6x+9-x²+25=-6x+34=-6×1⅚+25=-5+25=20