Раскройте скобки: 1) -3(4+5m -6n) 2) -0,2( -14t+z-25y) 3) (-3,1x+7,8y-9,6) * 0,1...

Question

Раскройте скобки:

1) -3(4+5m -6n) 2) -0,2( -14t+z-25y)

3) (-3,1x+7,8y-9,6) * 0,1 4)(0,7x-0,6y+0,5z)*(-1,5p)

Answer 1

1) 12-15m+18n
2) 2,8t-0,2z+5y
3)(-3,1x*0,14+7,8y*0,14)(0,7x*(-1.5p)-0.6y*(-1,5p)+0.5z*(-1.5p)=(-0,434x+1,092y-1,344)(-1,05xp+0,9yp-0,75zp)=0,65x2p-0,39xyp+0,33xzp-1,14yxp+0.98y2p-0,82yzp+1,41xp-1,21yp+1,01zp=xp(0,65xp+1,41)+yp(0,98yp-1,21-0,39x+1.14x)+zp(0,33x-0,82y+1,01)