Viết dạng tích của các tổng sau
a, ab+ac
b,ab-ac+ad
c,ax-bx-cx+dx
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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 )
1)ab+ac=a(b+c)
2)ab-ac+ad=a(b-c+d)
3)ax+bx-cx+dx=x(a+b-c+d)
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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)
a) ab+ac= a(b+c)
b) ab-ac+ad= a(b-c+d)
c) 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)
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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)
a,ab+ac=a(b+c)
b,ab-ac+ad=a(b-c+d)
c,ax-bx-cx+dx=(a-b-c+d)x
d,a(b+c)-d(b+c)
=ab+ac-bd+cd
=b(a-d)+(a+d)c
e,ac-ad+bc-bd
=c(a+b)-(a-b)d
f,ax+by+bx+ay
=a(x+y)+b(y+x)
a) \(ab+ac=a\left(b+c\right)\)
b) \(ab-ac+ad=a\left(b-c+d\right)\)
c) \(ax-bx-cx+dx=x\left(a-b-c+d\right)\)
d) \(a\left(b+c\right)-d\left(b+c\right)=\left(b+c\right)\left(a-d\right)\)
e) \(ac-ad+bc-bd=a\left(c-d\right)+b\left(c-d\right)=\left(c-d\right)\left(a+b\right)\)
f) \(ax+by+bx+ay=ax+bx+by+ay=x\left(a+b\right)+y\left(a+b\right)=\left(a+b\right)\left(x+y\right)\)
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
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) = (b + c)(a - d)
5) ac - ad + bc - bd = a(c - d) + b(c - d) = (c - d)(a + b)
6) ax + by + bx + ay = (ax + ay) + (bx + by) = a(x + y) + b(x + y) = (x + y)(a + b)
ab + ac = a ( b + c )
ab - ac + ad = a ( b - c + d )
ax - bx - cx + dx = x ( a - b - c + d )
a, \(ab+ac=a\left(b+c\right)\)
b, \(ab-ac+ad=a\left(b-c+d\right)\)
c, \(ax-bx-cx+dx=x\left(a-b-c+d\right)\)
a, ab + ac = a(b + c)
b,ab - ac + ad = a(b - c + d)
c,ax - bx - cx + dx = x(a - b) - x(c + d) = x (x - b - c - d)