Question

помогите пожалуйста!!!!​

Answer 1

$-2b*0,5b^{4} =-2 *0,5 *b^{1}*b^{4} = -1 * b^{1+4}=-b^{5}$

$14x^{2}y^{3}*(-\frac{2}{7} x) = 14*-\frac{2}{7} *x^{2}*x*y^{3} = -\frac{14*2}{7} *x^{2+1}*y^{3}=\\= -4x^{3} y^{3}$