\(\Leftrightarrow5\left(x-4\right)-\left(x-4\right)^2=0\\ \Leftrightarrow\left(x-4\right)\left(5-x+4\right)=0\\ \Leftrightarrow\left(x-4\right)\left(9-x\right)=0\Leftrightarrow\left[{}\begin{matrix}x=4\\x=9\end{matrix}\right.\)
Tìm x: \(-x^4+4x^2-5x^2+20=0\)
Tìm x biết :
1) x\(^2\) - 7x = 0
2) -3x\(^2\) + 5x = 0
3) x\(^2\) - 19x - 20 = 0
4) x\(^2\) - 5x - 24 = 0
Tìm x:
1, x(x-20)+x-2=0
2, 5x(x-3)-x+3=0
3, 3x(x-5)-(x-1)(2+3x)=30
4, (x+2)(x+3)-(x-2)(x+5)=0
1/Tìm Max B= 5-x2+2x-4y2-4
2/ Tìm x bít x3+5x2-4x-20=0
Tìm x biết :
a) 2(x + 5) - x^2 - 5x = 0
b) x^3 - 5x^2- 4x + 20 = 0
c) (2x - 1)^2 - (x + 3)^2 = 0
Tìm x biết :
a) 2(x + 5) - x^2 - 5x = 0
b) x^3 - 5x^2- 4x + 20 = 0
c) (2x - 1)^2 - (x + 3)^2
a) Tìm x biết : x^3 -4x^2+5x-20>0
b) Biết 3x2 -3xy-5x+5y =0 và x≠ 𝑦 Tính giá trị S = x2 -x
Tìm x
5x(x-3)(-2x+6)=0
(X+2)2-(x-2)(x+2)=0
(2x+3)2-(x-1)=0
X3-8=(x-2)3
X3+5x2-4x-20=0
bài 5 ; tìm x
f, a mũ 2 + x -x mũ 2 - a = a
g, x mũ 2 + 3x - ( 2x + 6 ) = 0
h, 5x + 20 - x mũ 2 - 4x =0
m, x mũ 3 - 5x mũ 2 - x + 5 = 0
n, x ( x - 3 ) - 7x + 21 = 0
