`2x^2 - 8x - 2x^2 + 3 =9`
`-8x = 6.`
`x=-3/4`.
`2x^2 - 8x - 2x^2 + 3 =9`
`-8x = 6.`
`x=-3/4`.
a, x^2-36/2x+10*3/6-x
b,5x-15/4x+4:x^2-9/x^2+2x+1
c,3-2x/ x^2-9 + 1/2x-6
d, -5/4+2y + y-2/2y+y^2
Giải các phương trình sau: a) 5x+9 = 2x b) (x+1).(4x-3)= (2x+5)(x+1) c) x/x-2 +x/x+2 = 4x/ x²-4 d) 11x-9= 5x+3 e) (2x+3)(3x-4) =0
Thực hiện phép tính : a) (x-3)(2x - 4) - 2x(x - 5) c) (3x²-17x² + 11x +15): (3x-5) d) b) (2x-5)²-(2x - 3)(2x + 3) 5x² x+2 x 2-x 4x x²-4 e) x-3 x+3 x + 36 x-3 9-x²
tìm x
a) ( 2x - 3 ) * ( x + 1 ) - x ( 2x + 3 ) - 9 = 0'
b) 2x ( x - 3 ) - x - 3 = 0
c) 2x * ( x^2 - 4 ) + 6 ( 4 - x^2)=0
a) x^4+2x^3-2x -1
b)9+ 6x+ x^2+x^4
c) a^3+b^3+c^3-3abc
d)x^4-4x^3-2x^2+12x+9
e)x^3+3x^2-x-3
f) x^3+2x^2+x+1
g) x^3+3x^2+x+2
h)x^3+5x^2+x+9
i) x^6-9x^3+8
k) x^5+x^4+1
l) x^7+x^5+ 1
Thực hiện phép tính:
a. (19x^2-14x^3+9-20x+2x^4) : (1+x^2-4x)
b. (3x^4-2x^3-2x^2+4x+8) : x^2-2
c. (2x^3-26x-24) : (x^2+4x+3)
Giúp mình với mn ơi :(((
tìm x
a)(x+6)^2-x(x+9)=0
b)6x(2x+5)-(3x+4)(4x-3)=9
c)2x(8x+3)-(4x+1)=13
d)(x-4)^2-x(x+4)=0
e)(x-2)^2-(2x+3)(x-2)=0
a)(2x+7)^2=9(x+2)^2
b)(x+2)^2=9(x^2-4x+4)
c)4(2x+7)^2-9(x+3)^2=O
d)(5x^2-2x+10)^2=(3x^2+10x-8)^2
Tìm x biết:
a,2x(x+1)-3-2x=5
b,2x(3x+1)+(4-2x)=7\
c,(x-3)^3-(x-3)(x^2+3x+9)+6(x-1)^2=6
Tìm x biết:
a,2x(x+1)-3-2x=5
b.2x(3x+1)+(4-2x)=7
c,(x-3)^3-(x-3)(x^2+3x+9)+6(x-1)^2=6