\(3x^2-16x+5=0< =>3x^2-15x-x+5=0< =>3x\left(x-5\right)-\left(x-5\right)=0< =>\left(x-5\right)\left(3x-1\right)=0< =>\left[{}\begin{matrix}x-5=0\\3x-1=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=5\\x=\dfrac{1}{3}\end{matrix}\right.\)
\(3x^2-16x+5=0< =>3x^2-15x-x+5=0< =>3x\left(x-5\right)-\left(x-5\right)=0< =>\left(x-5\right)\left(3x-1\right)=0< =>\left[{}\begin{matrix}x-5=0\\3x-1=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=5\\x=\dfrac{1}{3}\end{matrix}\right.\)
Giải các phương trình sau:
a) x − 2 x + x x + 2 = 2 ;
b) 2 x + 1 − 1 x − 2 = 3 x − 11 x + 1 x − 2 ;
c) 5 + 96 x 2 − 16 = 2 x − 1 x + 4 + 3 x − 1 x − 4 ;
d) 2 x + 2 − 2 x 2 + 16 x 3 + 8 = 5 x 2 − 2 x + 4 .
Tìm x biết:
a) (3x³ + x² – 13x + 5) : (x² + 2x – 1) = 10
b) (x⁴ – 2x² – 8) : (x – 2) = 0
c) \(\dfrac{x^2-4x}{x^2-8x+16}\)= 0
BT1: Tìm x biết.
a, (5x-1)(2x+7)-(x+1)(6x-5)=16
b, (10x+9).x-(5x-1).(2x+3)=8
c, (3x-5).(7-5x)+(5x+2).(3x+2)-2=0
d, x.(x+1).(x+6)-x3=5x
Tìm x
a) (3x-4)3=(3x-1)(3x-8x)2
b) (3x)3+ (x-8)(x+8)= (3x-4) (9x2+24x+16)
Thực hiện phép tính: a, 1x²+6x+91x²+6x+9 + 1x²+6x+91x²+6x+9 + 16x−x²−916x−x²−9 + xx²−9xx²−9 b, xx−2yxx−2y + xx+2yxx+2y + 4xy4y²−x4xy4y²−x c, x5x+5x5x+5 - x10x−10x10x−10 d, 4(x+3)3x²−x4(x+3)3x²−x : x²+3x1−3xx²+3x1−3x
Tìm x
a) 9(4x+3)^2 = 16(3x-5)^2
b) (x^3 - x^2)-4x^2 + 8x -4 = 0
g) x^5+ x^4 + x^3 + x^2 + x + 1 = 0
Giúp mình với
Tìm x, biết
a) 7x^2 – 28 = 0
b)2 phần 3x(x^2-4)=0
c) 2x^2 + 3x –5 = 0
d) 2x(3x – 5) – 5 + 3x = 0
e) (2x – 1)^2 – (2x + 5)(2x – 5) = 18
Tìm x, biết
a) 7x^2 – 28 = 0
b)2 phần 3x(x^2-4)=0
c) 2x^2 + 3x –5 = 0
d) 2x(3x – 5) – 5 + 3x = 0
e) (2x – 1)^2 – (2x + 5)(2x – 5) = 18
Phương trình x x - 5 - 3 x - 2 = 1 có nghiệm là
A. x = - 1 2
B. x = 5 2
C. x = 1 2
D. x = - 5 2
Giải các phương trình sau: x 3 - x - 1 3 4 x + 3 x - 5 = 7 x - 1 4 x + 3 - x x - 5