Упростите выражение:
а)b(m - 7) - 7b
б)x(c + 1) + c(x - 1)
в)y(x - 4) + x(3 - y)
г)m(k - 3) - k(m - 5)
д)a(1 - b) - a(1 + b)
e)b(2d - 5) - b(d + 5)
а)b(m - 7) - 7b=bm-7b-7b=bm-14b
б)x(c + 1) + c(x - 1)=xc+x+xc-c=2xc+x-c
в)y(x - 4) + x(3 - y)=yx-4y+3x-yx=3x-4y
г)m(k - 3) - k(m - 5)=mk-3m-mk+5k=5k-3m
д)a(1 - b) - a(1 + b)=a-ab-a-ab=-2ab
e)b(2d - 5) - b(d + 5)=2bd-5b-bd-5b=bd-10b
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а)b(m - 7) - 7b=bm-7b-7b=bm-14b
б)x(c + 1) + c(x - 1)=xc+x+xc-c=2xc+x-c
в)y(x - 4) + x(3 - y)=yx-4y+3x-yx=3x-4y
г)m(k - 3) - k(m - 5)=mk-3m-mk+5k=5k-3m
д)a(1 - b) - a(1 + b)=a-ab-a-ab=-2ab
e)b(2d - 5) - b(d + 5)=2bd-5b-bd-5b=bd-10b