b) 2(x + 3) – x2 – 3x = 0
⇔ 2(x + 3) - x(x + 3) = 0
⇔ (x + 3)(2 - x) = 0
⇔ x = -3 hoặc x = 2
Vậy: x = -3; x = 2
b) 2(x + 3) – x2 – 3x = 0
⇔ 2(x + 3) - x(x + 3) = 0
⇔ (x + 3)(2 - x) = 0
⇔ x = -3 hoặc x = 2
Vậy: x = -3; x = 2
tìm x biết : a)x(x-3)-x^2+5=0 b)x^2-6x=0 c)2x^3+5x^2-012x=0
Tìm x biết:
a) x 2 + 3 x = 0 b) x ( 2x − 1) + 4x − 2=0 c) ( x 2 + 2 x )2 − 2 x 2 − 4 x = 3
Tìm x biết: a)x(x-3)+x-3=0 b)(5x-4)^2-16^2=0
Tìm x, biết:
a) x(x - 2) + x - 2 = 0;
b) 5x(x - 3) - x + 3 = 0
Tìm x, biết : a.,(x-y)^2-(x-3).(x+3)=6; b, x^2-5x=0;c,x^2+6x+5=0
Tìm x,biết
A) x(x-2)+x-2=0
B) 5x(x-3)-x+3=0
Tìm x, biết:
a) 2-x = 2 ( x - 2 ) 3 ; b) 8 x 3 - 72x = 0;
c) ( x - 1 , 5 ) 6 + 2 ( 1 , 5 - x ) 2 = 0; d) 2 x 3 +3 x 2 +3 + 2x = 0;
e) x 3 - 4x- 14x(x - 2) = 0; g) x 2 (x + 1)- x(x + 1) + x(x - 1) = 0.
Tìm x biết.
a) 4x^2 - 49 = 0 b) x^2 + 36 = 12x
c) 1/16x^2 - x + 4 = 0 d) x^3 -3√3x2 + 9x - 3√3 = 0
e) (x - 2)^2 - 16 = 0 f) x^2 - 5x - 14 = 0
g) 8x(x - 3) + x - 3 = 0
tìm x biết
a) x(x -2 ) + x - 2 = 0
b) 5x (x-3) - x + 3 = 0
Tìm x biết: b/(x-2)^3+6(x+1)^2-x^3+12=0