4x+2 + 2.4x = 288
\(\Rightarrow\) 4x (42 + 2) = 288
\(\Rightarrow\) 4x.18 = 288
\(\Rightarrow\) 4x = 16
\(\Rightarrow\) x = 2
Vậy x =2.
4x+2 + 2.4x = 288
\(\Rightarrow\) 4x (42 + 2) = 288
\(\Rightarrow\) 4x.18 = 288
\(\Rightarrow\) 4x = 16
\(\Rightarrow\) x = 2
Vậy x =2.
a. 2x + 3 chia hết cho 3x - 2
b. x.x + 4x +7 chia hết cho x + 2
c. / x - 2 / - / 4x - 8/ + /6 - 3x / = 32
làm giúp vs nha
B1 tìm GTNN
a, A= x2 - 20x +101
b, B= 4x2 + 4x + 2
c, C= x2- 4xy + 5y2 + 10x -22y + 28
B2 tìm GTLN
a, x - x2
b, 4x - x2 + 3
Tìm x,y biết:
a) (2+4x) mũ 2 + (y-6) mũ 2 =0
b) |8-4x|+|2x-y|=0
c)|16+0,5x|+(y-2) mũ2 =0
Help me!!!
4x-20=2^5:2^2
TÌm x, biết:
a, 512-(128-5x)=3x+12
b, (2x-1)+(4x-2)+...+(400x-200)=5+10+...+1000
c, (x+2)+(4x+4)+(7x+6)+...+(25x+18)+28x+20)=1560
d, x+4x+5x+9x+14x+...+97x=500
e, 720-[41-(2x-5)]=23.5
f, 697:\(\dfrac{15x+364}{x}\)=17
x2+4x=0
70 : 4x + 720 / x =1/2
(1/2x-1/3y).(1/6xy+1/9y^2+1/4x^2)
Tìm x biết 4x+720/x = 1/2
Giúp mình nha! tìm x đó:
5x -2^3=4x+3^2