a) \(=x^3-8-x^3+x=x-8\)
b) \(=x^2+x-3x-3-x^2+16=13-2x\)
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Giup mk not bai nay , dang gap !
Thuc hien phep tinh:
a, (x -2) ^3 -x(x+1)(x-1) + 6x(x -3)
b, (x-2)(x^2 - 2x +4)(x+2)(x^2 +2x + 4)
Thanks moi ng nha !
a)(x-2)(3x+5)=(2x-4)(x+1)
b)(2x+5)(x-4)=(x-5)(4-x)
giup mk voi nha cam on
Bai 1 Phan tich da thuc thanh nhan tu
x^3 + 3x- 3xy- 3y
Bai 2 Tim x
( 2x - 1) ( 2x + 1) - 4 ( x ^2 +x ) = 16
cac bn lam on giup mink di ma
tinh nhanh bieu thuc sau
a) x^6-20x^5-20x^4-20x^4-20x^3-20x^2-20x+1992 voi x= 21
b)x^7-26x^6+27x^5-47x^4-77x^3+50x^2+x+1989 tai x = 25
c)4029-2015x+2015x^2-....+2015x^2014-x^2015 tai x= 2014
d)A= (x-1/x-2015+x-2/x-2014+x-3/x-2013+....+x-2014/x-2+x-2015/x-1):(1/2 +1/3+1/4+....+1/2016) tai x=2016 dau / o day la phan do nha!!
xin nho cac ban giai giup cho minh! cam on nhieu!!!!!!!! minh dang can ket qua gap
tim x biet
a) 4(x+1)^2-9(x+2)^2=0
b) 4(x+1)^2+(2x-1)^2-8(x+1)(x-1)=11
giai cach lam giup minh nha
bai 1 tinh
a)(x+3)^2
b)(2x+1)^2-(2x+3)(2x-3) giup em nhanh nhe
Tinh x
a)3.(2x-1)-x.(3x-2)=3x.(1-x)+2
b)2x3.(2x-3)-x2.(4x2-6x+2)=0
thuc hien phep nhan
(x2+x+1).(x3-x2+1)
giup minh nha thu bay minh nop cho thay roi cam on
A= x^2 - 6x + 15
B= 2x^2 - 10x + 8
C= x^2 + y^2 - 2x -2y + 7
Tim GTNN ( Min)
Giup minh voi nha >< Minh can cho bai ktra ngay mai lam >< Cam on a ><
Cm da thuc sau ko phu thuoc vao x
a)x(x3+x2-3x+2)-(x2-2)(x2+x+3)+4(x2-x-2)
b)(x+5)(x+4)(x-2)-(x2+11x-9)(x+1)+5x2
xac dinh he so a,b,c
a)(x2+cx+2)(ax+b)=x3-x2+2 (voi moi x)
b)(ay2+by+c)(y+3)=y3+2y2-3y (voi moi y)
minh can gap lam giup minh nha cam on