1) \(ab+ac=a\left(b+c\right)\)
2) \(ab-ac+ad=a\left(b-c+d\right)\)
3) \(ax-bx-cx+dx=x\left(a-b-c+d\right)\)
4) \(a\left(b+c\right)-d\left(b+c\right)=\left(a-d\right)\left(b+c\right)\)
5) \(ac-ad+bc-bd=a\left(c-d\right)+b\left(c-d\right)=\left(a+b\right)\left(c-d\right)\)
6) \(ax+by+bx+ay=a\left(x+y\right)+b\left(y+x\right)\) \(=\left(a+b\right)\left(x+y\right)\)
1. a*(b+c)
2. a*(b-c-d)
3. (a-b-c-d)*x
4. (a-d)*(b+c)
5. (a+b)*c-d*(a+b)
6. (a+b)*x+(a+b)*y
6.
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)
hai bạn kacura và aoi ogata thì ai gửi câu trả lời trước vậy