viet gon bieu thuc sau duoi dang 1 phan thuc :
(x2 -x+1)(x4 -x2 +1)
Viet bieu thuc sau duoi dang 1 luy thua5^12*7-5^11*10
5^12*7-5^11*10
=5^11*(5x7-10)(mjk đặt 5^11 làm ts chung)
=5^11x25=5^11 x 5^2=5^13
viet cac cong thuc 2(x-2)^2 : x+1 va 2x^2-10x+12 : x-1 duoi dang nhung phan thuc co cung tu thuc
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
GTLL cua bieu thuc 14+2x-2x^2 la ....... nhap ket qua duoi dang phan so gon nhat
1.Viet bieu thuc sau duoi dang binh phuong cua mot tong:
2xy2 +x2y4 +1
2. Phan tich da thuc thanh nhan tu:
a) 3x2 - 7x -10
b) 2x2 -5x -7
HELP ME!!!!*!*
1. 2xy2 +x2y4+1 = (xy2+1)2
2. a)3x2+3x-10x-10=3x(x+1)-10(x+1)=(x+1)(3x-10)
b)2x2-5x-7=2x2+2x-7x-7=2x(x+1)-7(x+1)=(x+1)(2x-7)
Mong có thể giúp được bạn
viet cac bieu thuc sau duoi dang tich: x^3 y^3+225
\(x^3y^3+125=\left(xy+5\right)\left(x^2y^2-5xy+25\right)\)
Viet bieu thuc sau duoi dang binh phuong cua 1 tong:
2xy2 + x2y4 +1
\(2xy^2+x^2y^4+1\\ =\left(xy^2\right)^2+2xy^2.1+1^2\\ =\left(xy^2+1\right)^2\)
Ta có :
\(2xy^2+x^2y^4+1=\left(xy^2\right)^2+2.xy^2.1+1^2\)
\(=\left(xy^2+1\right)^2\)
viet cac bieu thuc sau duoi dang tich:
b,(a-1)\(^3\)-(a+1)\(^3\)
\(\left(a-1\right)^3-\left(a+1\right)^3=a^3-3a^2+3a-1-a^3-3a^2-3a-1=-6a^2-2=-2\left(3a^2+1\right)\)
Viet bieu thuc sau duoi dang binh phuong cua mot tong:
2xy2 +x2y4 +1
Phan tich da thuc sau thanh nhan tu:
a) x2 -3x +2
b) 3x2 - 7x -10
c) 2x2 -5x -7
HELP ME!!!
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)