Question

(x-1)(x^2+x+2) при x=-4
и 6 номер​

Answer 1

5) (x - 1)(x² + x + 1) = x³ - 1

x³ - 1 = (- 4)³ - 1 = - 64 - 1 = - 65

$6)\frac{39,5^{2}-3,5^{2}}{57,5^{2}-14,5^{2}}=\frac{(39,5-3,5)(39,5+3.5)}{(57,5-14,5)(57,5+14,5)}=\frac{36*43}{43*72}=\frac{36}{72}=\frac{1}{2}=0,5$