Tìm x
a,(x+4)^2-1=0
b,(2x-3)^2=100
c,x^2+8x+16=0
d,4x^2-12x=-9
Viết theo mẫu : A^2+2ab +B=(A+B)^2
a) x^2 + 2x +1
b)x^2 + 8x+16
c) x^2 +6x +9
d)4x^2+4x+1
e) 36+ x^2 - 12x
f) 4x^2 + 12x +9
g) x^4 +81 +18x^2
h) 9x^2 + 30xy + 25y^2
Tìm x
a,(x2-4x+16)+(x+4)-x*(x+1)*(x+2)+3x2=0
b,(8x+2)*(1-3x)+(6x-1)*(4x-10)=-50
c,(x2+2x+4)*(2-x)+x*(x-3*(x+4))-x2+24=0
d,(x/2+3)*(5-6x)+(12x-2)*(x/4+3)=0
Giai PT a, 6/x^2-1 + 5 = 8x-1/4x+4 - 12x-1/4-4x
b, 2x+1/2x-1 - 2x-1/2x+1 = 8/4x^2 -1
c, 3/2x-16 + 3x-20/x-8 + 1/8 = 13x-102/3x-24
d, x+4/x^2-3x+2 - x+1/x^2 -4x+3 = 2x+5/x^2-4x+3
Tìm x
a, 3(x-1)^2-3x(x-5)=2
b, 4x^2-12x=-9
c, (2x-3)^2=(x+5)^2
d, (x^4-2x^3+4x^2-8x)÷(x^2+4)-2x=-4
e, x-2/2-x+3/3+x+4/5-x+5=0
a)biết 8x^3+12x^2y+6xy^2+y^3=27
tính x(2x+y)+xy+1/2y
b) cho x^2+y^2+z(x-y+1)=0
tính x+y
c) cho a+b+c=9,a^2+b^2+c^2=53
tính ab, ac, bc
Bài 1:tìm x ,biết:
a)(2x-1)(3x+2)-6x(x+1)=0
b)(4x-1)2-(2x+1)(8x-3)=0
c)4x2-1=2(2x+1)
BÀI 2:Phân tích đa thức thành nhân tử :
a)4x2-9y2-6y-1
b)4x2-1-2x(2x-1)
c)x2-8x-4y2+16
d)9x2-12x-y2+4
e)4x2+10x-5
Tìm x biết
a)(x+3)^2(x-2)^2=2x b)7x(x-2)=(x-2) c)8x^3-12x^2+6x-1=0
d)4x^2-9-x(2x-3)=0 e)x^3+5x^2+9x=-45 f)x^3-6x^2-x+30=0
giai phuong trinh
2x(8x - 1)^2 (4x - 1) = 9
(12x + 7)^2 (3x + 2)(2x + 1) = 3
giai chi tiet gium nha mik tick cho