a) (x+2)2 - (x-2).(x+2) = 0
=> x2+4x+4-x2+4 = 0
=> 4x+8 = 0
=> 4x = 0-8
=> 4x = -8
=> x = -8:4
=> x = -2
c) x=0
a) (x+2)2 - (x-2).(x+2) = 0
=> x2+4x+4-x2+4 = 0
=> 4x+8 = 0
=> 4x = 0-8
=> 4x = -8
=> x = -8:4
=> x = -2
c) x=0
Bài 1:Tìm x biết:
a.,2x(x-3)-15+5x=0
b,x^3-7x
c,(2x-3)^2-(x+5)^2=0
d,x^3-x^2-4x^2+8x-4=0
giúp mk với mk cầm gấp lắm TvT
Tìm x biết:
a)3.(x-2)+2.(x-3)=5
b)(2x-8)2-16=0
c)(2x-1)2-(4x+1).(x-3)=3
tìm x biết:
a) x - 3= (3 - x)^2
b) x^3 + 3/2x^2 + 3/4x + 1/8 = 1/64
c) 8x^3 - 50x = 0
d) (x - 2) (x^2 + 2x + 7) + 2(x^2 - 4) - 5(x - 2) = 0
e) x(x + 3) - x^2 - 3x = 0
f) x^3 + 27 + (x + 3) (x - 9) = 0
Giúp mik vs ạ
Tìm x,biết
a)4x 9x2-1=0
b)(x+2)2 -(x+2)(x-3)=0
c)2x3-4x2+2x=0
d)(x-1)2-(2x+1)2=0
bài 3: tìm x , biết:
a)(x+3).(2x-1)-(x-3).(x+1)=0
b)(x+4).(2x-3)-3.(x-2).(x+2)=0
c)x.(x-5).(x+5)-(x+2).(x2-2x+4)=17
a) (3x-1).(2x+7)-(x+1).(6x-5)=7
b) (x+1)^3-x.(x-2)^2+x-1=0
c) (x+2).(x^2-2x+4)-x(x^2+3)
d) 2x.(x-3)-5.(3-x)=0
giúp mình ạ cần gấp
Tìm x biết:
a, 16x² – 9(x + 1)²= 0
b, x2 (x – 1) – 4x2 + 8x – 4 = 0
c, x(2x – 3) – 2(3 – 2x) = 0
d, (x – 3)(x² + 3x + 9) – x(x + 2)(x – 2) = 1
e, 4x² + 4x – 6 = 2
f, 2x² + 7x + 3 = 0
Tìm x,biết:
a)(2x-3)2-49=0
b)2x.(x-5)-7.(5-x)=0
c)x2-3x-10=0