Question

Usuń nawiasy i wykonaj redukcję wyrazów podobnych: a.7(3a-2b)+4(8b-a) b.5(x-3y+2)+9(-5x+4y-3) c.6(4p-7r)-2(8p-9r) d.-8(-3m+9p+2)-5(6m-6p-9) e.4(4a-7b)-7(3a-5b)-2(6b-5a f.0,5(8x-12y)+0,6(5x-15y)

Answer 1

a)7(3a-2b)+4(8b-a)=21a-14b+32b-4a=17a+18b

b)5(x-3y+2)+9(-5x+4y-3)=5x-15y+10-45x+36y-27=-40x+21y-17

c)6(4p-7r)-2(8p-9r)=24p-42r-16p+18r=8p-24r

d)-8(-3m+9p+2)-5(6m-6p-9)=24m-72p-16-30m+30p+45=-6m-42p+29

e) 4(4a-7b)-7(3a-5b)-2(6b-5a)=16a-28b-21a+35b-12b+10a=5a-5b

f)0,5(8x-12y)+0,6(5x-15y)=4x-6y+3x-9y=7x-15y