Bài 1 : Tìm x,biết :
a, √ x^4 =2
b, 3√ X+1-8=0
c 2 √X-3 + 25X -75 = 14
d, √ (3X-1)^2 =5
e, √ (X^2 +4X+4) -6 = 0
Anh em giúp nhớ mai mình kiểm tra rồi nhé
giải pt
a 3x(x-1)+2(x-1)=0
b x^2-1-(x+5)(2-x)=0
c 2x^3 +4x^2-x^2+2=0
d x(2x-3)-4x+6=0
e x^3-1=x(x-1)
f (2x-5)^2 -x^2-4x-4=0
h (x-2)(x^2+3x-2)-x^3+8=0
GIẢI PT: 1) -2x^4 + 8x^3 - 3x^2 - 4x +4 =0
2) -3x^4 + 12x^3 - 26x^2 + 28x +8 =0
3) -2x^4 +12x^3 - 15x^2 -9x -1 =0
4) 3x^4 - 5x^3 - 16x^2+ 15x + 27 =0
Bài 1. Giải các pt sau
a)x2 - 49x - 50 = 0
b) 3x2 - 7x - 10 = 0
c) x2 - 4x - 5 = 0
d) x2 + 2x - 3 = 0
e) x2 + 2020x - 2021 = 0
f) x2 + 9x - 10 = 0
g) -5x2 + 4x + 1 = 0
h) 4x2 + 3x - 7 = 0
\(\sqrt{x-1}+\sqrt{4x-4}-\sqrt{25x-25}+2=0\)
\(x+\sqrt{5-4x}=0\)
\(\sqrt{1-2x^2}=x-1\)
\(a,3x^3+6x^2-4x=0\)
\(b,\left(x+1\right)^3-x+1=\left(x-1\right)\left(x-2\right)\)
\(c,\left(x^2+x+1\right)^2=\left(4x-1\right)^2\)
\(d,\left(2x^2+3\right)^2-10x^3-15x=0\)
a) Căn 2x^2-3x-11= căn x^2-1
b) Căn 2x^2-3x+1= căn x+5
c) (x-1).cẵnx^2-3x=0
d) x^2-4x-10-3 căn(x+2).(x-6)=0
e) Căn x+căn5-x+cănx.(5-x)=0
giải pt
a, 2x^3++3x^2-8x-12=0
b, x^3-4x^2-x+4=0
c,x^3-x^2-x-2=0
d,x^4-3x^3+3x^2-x=0
e,(x+1)(x^2-2x+3)=x^3+1
g,x^3+3x^2+3x+1=4x+4
Câu 2: Tìm x biết:
a. \(\sqrt{\left(2x-3\right)^2}=7\)
b. \(\sqrt{64x-121}-\sqrt{25x-50}-\sqrt{4x-1}=20\)
c. \(\sqrt{x^2-9}-3\sqrt{x-3}=0\)