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1, ab + ac = a(b+c)
2, ab - ac + ad = a(b-c+d)
3, ax-bx-cx+dx = x(a-b-c+d)
4, a(b+c) - d(b+c) = (a-d)(b+c)
5, ac-ad+bc-bd = a(c-d) + b(c-d) = (a+b)(c-d)
6, ax+by+bx+ay=ax+ay+bx+by=a(x+y)+b(x+y)=(a+b)(x+y)
a(b+c)
a(b-c+d)
x(a-b-c+d)
(b+c)(a-d)
a(c-d)+c(c-d)=(c-d)(a+c)
a(x+y)+b(x+y)=(x+y)(a+b)
T
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(a\left(b+c\right)-d\left(b+c\right)\)
\(=\left(b+c\right)\left(a-d\right)\)
\(ac-ad+bc-bd\)
\(=a\left(c-d\right)+b\left(c-d\right)\)
\(=\left(c-d\right)\left(a+b\right)\)
\(ax+by+bx+ay\)
\(=\left(ax+ay\right)+\left(by+bx\right)\)
\(=a\left(x+y\right)+b\left(y+x\right)\)
\(=\left(x+y\right)\left(a+b\right)\)
ab+ac-do+dc
a(c-d)+b(c-d)
a(x+y)+b(y+x)
Mk làm đúng đó, k mk nha
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ab + ac = a(b + c)
ab - ac + ad = a(b - c + d)
ax - bx - cx + dx
=x(a - b - c + d)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.ac - ad + bc - bd
= a.(c - d ) + b.( c - d )
= ( c - d ) . a + b
2. ax + by +bx + ay
= a.( x + y ) + b. ( y + x )
= ( x + y ) . ( a + b )
hihi
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![](https://rs.olm.vn/images/avt/0.png?1311)
ĐẶT NHÂN TỬ CHUNG NHA!
1) ab - ac + ad = a( b- c +d )
2) ax - bx - cx + dx = x( a-b-c+d)
3) a.( b + c ) - d . ( b + c )= (b+c)(a-d)
4) ac - ad + bc - bd = a( c-d) + b( c-d) = (a+b)(c-d)
5) ax + by + bx + ay= a( x+y) + b( x+y) = (a+b)(x+y)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
ab + ac = a( b + c )
ab - ac + ad = a( b - c + d )
ax + bx - cx + dx = x( a + b - c + d )
1)ab+ac=a(b+c)
2)ab-ac+ad=a(b-c+d)
3)ax+bx-cx+dx=x(a+b-c+d)
tk minh nha dung 100% luon
(c-d)*(a+b)
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