a: \(\Leftrightarrow x^2+10x+25-x^2+4x=55\)
=>14x=30
hay x=15/7
b: \(\Leftrightarrow\left(x-7\right)\left(x-3\right)=0\)
hay \(x\in\left\{7;3\right\}\)
Tìm x: (làm ơn giúp e vs)
a) (x + 5)2 - x(x - 4) = 55
b) x(x - 7) - 3x + 21 = 0
Tìm x:
a)(x+2)^2-2(x+2)(x-5)=0
b)2x^2+3x-5=0
c)x+2√2x^2+2x^3=0
d)(3x-1)^2-4(x+5)^2=0
Tìm x:
a)(3x+5).(7-2x)+6x.(x+4)=0
b)x3-25x=0
Tìm x:
a) 5x(4-x) + (5x^2-12)=x+6
b) (2x-7) . (5+4x) -8.(x^2-3x+5) = -30
Tìm x:
a)(x-1)^2+x(5-x)=8
b)x^3-3x^2+x-3
c)(12x^4-6x):6x+2x(2+x)(2-x)=7
Tìm x:
a) (x-2)2-(x2-3x)=9
b) (5x-2)2=(4-x)2
c) x2-4x-5=0
Tìm x:
a) (x-2)2-(x2-3x)=9
b) (5x-2)2=(4-x)2
c) x2-4x-5=0
Tìm x:
a) x(x-1)+x=4
b) 3x(x-5)-2x+10=0
c) 5x2-3x-2=0
d) x4-11x2+18=0
Tìm x:
a)(x+3)2-4x-12=0
b)x(x+5)(x-5)-(x-3)(x2+3x+9)=7
