8x2-14x+5=8x2-4x-10x+5=4x(2x-1)-5(2x-1)=(2x-1)(4x-5)
8x2-14x+5=8x2-4x-10x+5=4x(2x-1)-5(2x-1)=(2x-1)(4x-5)
tìm x
a) (2x+5)(2x-7)-(-4x-3)2=16
b) (8x2+3)(8x2-3)-(8x2-1)2=22
c) 49x2+14x+1=0
d) (x-1)3-x(x-2)2-(x-2)=0
giúp mình với nha
1:
1). 2x-3=11-5x
2). 0,5(2x-9)=1,5x(x-5)
3). 28(x-1)-9(x-2)=14x
4). 8(3x-2)-14x=2(4-7x)+18x
5). 2(x-5)-6(1-2x)=3x+2
6). 2x-3=3(x-1)+x+2
Tìm x, biết: 2x3 + 9x2 + 14x + 5 = 0.
tim x:
a)4x(x-5)-(x-1)(4x-3)=5
b)(3x-4)(x-2)=3x(x-9)-3
c)x^2-81=0
d)3x^2-75=0
e)x^2-14x+3=0
minh can gap. thank you
Làm tính chia:
a) (3x4 - 8x3 - 10x2 + 8x - 5) : (3x2 - 2x + 1)
b) (2x3 - 9x2 + 19x - 15) : (x2 - 3x + 5)
Câu hỏi: Làm tính chia:
a/ (2x4 - 11x3 + 19x2 - 23x + 5) : (x2 - 4x + 1)
b/ (3x4 - 8x3 - 10x2 + 8x - 5) : (3x2 - 2x + 1)
c/ (2x4 - 23x + 19x2 -11x3 + 5) : (x2 - 4x + 1)
b)x^2-8x-4y^2+16
c)x^2-8x-4y^2+16
Tìm giá trị nhỏ nhất
a/ x2+10x+27
b/x2+x+7
c/x2-12x+37
d/x2-3x+5
f/x2+14x+y2-2y+7
g/x2+4xy+2y2-22y+173
2x^3-8x^2+8x