a) ab - ac + ad = a(b - c + d)

b) ac + ad - bc - bd = a(c + d) - b(c + d) = (a - b) (c + d)

a)ab−ac+dc−db=a(b+c)−d(b−c)=(b−c)(a−d)

b)ac+ad−bc−bd=a(c+d)−b(c+d)=(c+d)(a−b)

tick mình đủ 20 với 

ai ko giải được thì tick mk tick cho

A = ab - ac + ad

= a(b - c  + d)

B = ac + ad - bc - bd

= a(c + d) - b(c + d)

= (a - b)(c + d) 

A=a.(b-c+d)

B=a.(c+d)-b.(c-d)

tick mình nha bạn

A=ab-ac+ad=a(b-c+d)

B=ac+ad-bc-bd=(ac+ad)-(bc+bd)=a(c+d)-b(c+d)=(c+d)(a-b)

ab-ac+ad = a(b-c+d)

ac+ad-bc-bd = a(c+d)-b(c+d) =(a-b)(c+d)

a) = a( b - c + d )

b) =( a -b )( c + d )

tick nha

a)a(b-c+d)

b)(a-b)(c+d)

a) ab - ac + ad = a(b - c + d)

b) ac + ad - bc - bd

= a(c + d) - b(c + d)

= (c + d) (a - b)

A,

ab-ac+ad=a(b-c+d)

B,

ac+ad-bc-bd=a(c+d)-b(c+d)=(a-b)(c+d)

ab-ac+ad

=a.(b-a+d)

b) ac+ad-bc-bd

  =c.(a-b)+d(a-b)

  =(a-b).(c+d)

ab - ac + ad = a.(b - c + d)

ac + ad - bc - bd = a(c + d) - b(c + d)

= (a - b)(c + d)

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kết bạn nha!

tick mình đi

ab - ac + ad = a.(b - c + d)

ac + ad - bc - bd = a.(c + d) - b.(c + d) = (c + d)(a - b)

a)

ab - ac + ad = a.(b - c +d)

b)

ac + ad - bc - bd = a.(c + d) - (bc + bd)

                         = a (c+d) - b.(c +d)

                        = (c.d) . (a-b)

tick cho minh nha cac ban

a) ab - ac + ad = a.(b - c + d)

b) ac + ad - bc - bd = a.(c + d) - b.(c + d) = (c + d).(a - b)