x2 - 3x + 2
= x2 - x - 2x + 2
= x(x - 1) - 2(x - 1)
= (x - 1)(x - 2)
3x2 - 7x - 10
= 3x2 + 3x - 10x - 10
= 3x(x + 1) - 10(x + 1)
= (x + 1)(3x - 10)
2x2 - 5x - 7
= 2x2 + 2x - 7x - 7
= 2x(x + 1) - 7(x + 1)
= (x + 1)(2x - 7)
viet cac bieu thuc sau duoi dang binh phuong cua mot tong hoac mot hieu
xy^2+(2+xy^2)+10-6x+x^2
CMR bieu thuc sau viet duoc duoi dang tong cac binh phuong cua hai bieu thuc
x2+2(x+1)2+3(x+2)2+4(x+3)2
viet da thuc sau duoi dang binh phuong cua 1 tong hoac 1 hieu
\(\left(2x+3y\right)^2+2\left(2x+3y\right)+1\)
viet da thuc sau thanh tong cua 2 binh phuong
a, x^2+2y^2-2xy-2x+2
b, 2x^2-2x+13
c, 3x^2+2x+3
viet cac bieu thuc sau duoi dang tong cua 3 binh phuong
a)(a+b+c)\(^2\)+a\(^2\)+b\(^2\)+c\(^2\)
b)2(a-b)(c-b)+2(b-c)(c-a)+2(b-c)(a-c)
ai giai giup minh minh tich cho
Viet da thuc x^2+3x+2 duoi dang da thuc cua x-1
Viet moi bieu thuc sau ve dang tong hoac hieu 2 binh phuong:
a) (x+y+4)(x+y-4)
b)(x-y+6)(x+y-6)
phan tich da thuc sau thanh nhan tu:a^2.b^2.(a-b)+b^2.c^2(b-c)+a^2.c^2 .(c-a)
viet cac bieu thuc sau duoi dang tich:
a, -64+(x-3)\(^3\)
