Question

паммоогите дам 34 бала

Answer 1

0,625   ///////////////////////////////

Answer 2

${m}^{2} - mn - 3m + 3n = ( {m}^{2} - mn) - (3m - 3n) = m(m - n) - 3(m - n) = (m - 3)(m - n) = (0.5 - 3)(0.5 - 0.25) = - 2.5 times 0.25 = - . = 625$