=> 2x - 5 = 0 => 2x = 5 => x = 5/2
hoặc 3/2x + 9 = 0 => 3/2x = -9 => x = -6
hoặc 0,3x - 12 = 0 => 0,3x = 12 => x = 40
Vậy x = 5/2 ; x = -6 ; x = 40
Tìm
\(\left(2x-5\right)\left(\frac{3}{2}x+9\right)\left(0,3x-12\right)=0\)
Tìm x, biết:
a, \(\frac{1}{4}\)+ \(\frac{1}{3}\): 2x = -5
b, ( 3x - \(\frac{1}{4}\)) . ( x + \(\frac{1}{2}\)) = 0
c, ( 2x - 5 ) . ( \(\frac{3}{2}\)x + 9 ) . ( 0,3x - 12 ) = 0
a) \(\left(3x-\frac{2}{4}\right).\left(x+\frac{1}{2}\right)=0\)
b) \(\left(2x-5\right).\left(\frac{3}{2}x+9\right).\left(0,3x-12\right)=0\)
Mk cần gấp .
Bài 9: Tìm x biết:
d) (2x - 1) . (3x + 1) + (3x + 4) . (3 - 2x) = 5
e) 0,6x (x - 0,5) - 0,3x (2x + 1,3) = 0,38
f) (c - 3x2)(x + 6) + x(3x2 + 17x) = 24
tinh so huu ti x
2/3x-3/12=4/5-(7/x-2)
2x-3/3+-3/2=5-3x/6-1/3
tim x
(x-1).(x-2)>0
2x-3<0
(2x-4).(9-3x)<0
moi nguoi giup minh nhe cam on nhieu
bài 1 Tim x a, 0,6x(x-0,5)-0,3x(2x+1,3)=0,138. , b, 3x2-3x(-2+x)=36. c, 2.(5x-8)-3(4x-5)=4(3x-4)+11 d, 1/3x2-4x+2x(2-3x)=0. e, 5x-3{4x-2(5x-2)]}=182 bài 2 thực hiện phép tính a, (-2x3-1/4y-4yz)8xy2 c,-6x+3(7+2x) e, 1/3xz(-9xy+15yz)+3x2(2yz2-yz)
1, tìm x biết:
a, |2,7-x|=|-0,3|
b,12/5 -|x+1,5|=0
c,2.|2x-3|=1/2
d, 7,5-3.|5-2x|=-4,5
e, |3x-4|+|3y+15|=0
ê, |x-y|+ |y+9/25|=0
Tìm x
a) 6x(5x + 3) + 3x(1 – 10x) = 7 b) (3x – 3)(5 – 21x) + (7x + 4)(9x – 5) = 44
c) (x + 1)(x + 2)(x + 5) – x2(x + 8) = 27
d) 5x(12x + 7) – 3x(20x – 5) = - 100
e) 0,6x(x – 0,5) – 0,3x(2x + 1,3) = 0,138
Thực hiện phép tính:
A) 3x^2(-5x^2+2)
B) -4x^3(3x^2+2x-5)
C) 1/3x^2.(0,3x^4+6/7x^2-3/4)
