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\(a\left(b+c\right)-d\left(b+c\right)\)
\(=\left(b+c\right)\left(a-d\right)\)
\(ac-ad+bc-bd\)
\(=a\left(c-d\right)+b\left(c-d\right)\)
\(=\left(c-d\right)\left(a+b\right)\)
\(ax+by+bx+ay\)
\(=\left(ax+ay\right)+\left(by+bx\right)\)
\(=a\left(x+y\right)+b\left(y+x\right)\)
\(=\left(x+y\right)\left(a+b\right)\)
ab+ac-do+dc
a(c-d)+b(c-d)
a(x+y)+b(y+x)
Mk làm đúng đó, k mk nha
ab + ac = a(b + c)
ab - ac + ad = a(b - c + d)
ax - bx - cx + dx
=x(a - b - c + d)
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)
a) ab+ac=a(b+c)
b) ab-ac+ad=a(b-c+d)
c) ax-bx-cx+dx = x(a-b-c+d)
d) a(b+c)-d(b+c)= (b+c)(a-d)
e) ac-ad+bc-bd = a(c-d)+b(c-d)= (c-d)(a+b)
g) ax+by+bx+ay= x(a+b)+y(a+b)=(x+y)(a+b)
a,a.(b+c)
b,a.(b-c+d)
c,x.(a-b-c+d)
d,(a-d).(b+c)
...............
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) \(ax+by+bx+ay=ax+bx+by+ay=x\left(a+b\right)+y\left(a+b\right)=\left(a+b\right)\left(x+y\right)\)
\(a,4^3.8^2.27^4=\left(2^2\right)^3.\left(2^3\right)^2.\left(3^3\right)^4=2^6.2^6.3^{12}=2^{12}.3^{12}=\left(2.3\right)^{12}=6^{12}\\ b,27^4.81^2.16^5=\left(3^3\right)^4.\left(3^4\right)^2.\left(2^4\right)^5=3^{12}.3^8.2^{20}=3^{20}.2^{20}=\left(3.2\right)^{20}=6^{20}\\ c,5^3.25^4.125^2=5^3.\left(5^2\right)^4.\left(5^3\right)^2=5^3.5^8.5^6=5^{3+8+6}=5^{17}\\ d,10^2.100^3.1000000^3=10^2.\left(10^2\right)^3.\left(10^6\right)^3=10^2.10^6.10^{18}=10^{2+6+18}=10^{26}\)
a) 538 = 5.100 + 3.10 + 8.1 = 5 . 10 2 + 3 . 10 1 + 8 . 10 0 .
b) 8609 = 8.1000 + 6.100 + 9.1 = 8 . 10 3 + 6 . 10 2 + 9 . 10 0 .
c) a b c = a.100 + b.100 + c.l = a . 10 2 + b . 10 1 + c . 10 0
d) a b c d = a.1000 + b.100 + c.10 + d = a . 10 3 + b . 10 2 + c . 10 1 + d . 10 0
a) 126 = 1 . 10 2 + 2 . 10 1 + 6 . 10 0
b) 1068 = 1 . 10 3 + 6 . 10 1 + 8 . 10 0
c, a 0 b = a . 10 2 + b . 10 0
d, a 0 b c = a . 10 3 + b . 10 1 + c . 10 0
a( b + c ) - d( b + c )
= a . b + a . c - d . b + d . c
= a . b + a . c - d . b + d . c
=axb+axc-dxb+dxc
=axb+axc-dxb+dxc
=axb+axc-dxb+dxc