\(\Leftrightarrow\)4.(x2+2x+1)+4x+4x2+1-8(x2+10x-x-10)=11
\(\Leftrightarrow\)4x2+8x+4+4x+4x2+1-8x2-80x+8x+80=11
\(\Leftrightarrow\)-60x=-74
\(\Leftrightarrow\)x=\(\frac{37}{30}\)
Tìm x biết
a) (x+2).(x+3) - (x-2).(x+5)=10
b) (3x+2). (2x+9) - (x+2). (8x+11)=(x+1).(3-2x)
c) 3.(2x-1).(3x-1)-(2x-3).(9x-1)=0
d) (5x-8).(4x-5)-(3x-4).(2x+12)=12
Bài 1: Tìm x, biết:
a) 4.(x+1)^2+(2x-1)^2-8(x-1)(x+1)=11
b) (x-2)^3-x(x+2)(x-2)+6x(x-3)=0
c) (x-1)(x^2+x+1)-x(x-3)(x+3)=6
Bài 2: Tìm GTNN của:
a) A= x^2-2x+10
b) B= x^2-5x-7
c) C= 3x^2+3x-5
Tìm x
a) 4(x + 1)2 + (2x + 1)2 - 8(x – 1)(x + 1) - 11=0
b)(x + 3)2 – (x – 4)(x + 8) – 1 = 0
Giải các phương trình sau:
\(e.\dfrac{12}{1-9x^2}=\dfrac{1-3x}{1+3x}-\dfrac{1+3x}{1-3x}\)
\(f.\dfrac{6x+1}{x^2-7x+10}+\dfrac{5}{x-2}=\dfrac{3}{x-5}\)
\(g.\dfrac{2}{x+2}-\dfrac{2x^2+16}{x^3+8}=\dfrac{5}{x^2-2x+4}\)
\(h.\dfrac{8}{x-8}+\dfrac{11}{x-11}=\dfrac{9}{x-9}+\dfrac{10}{x-10}\)
1/ giải phương trình:
a)(x^2-x)/(x^2+x+1)-(x^2-x+2)/(x^2-x-2)=1
b)x^8-2x^4+x^2-2x+2=0
2/ cho 2 số dương thỏa a^10+b^10=a^11+b^11=a^12+b^12. Cm: 2017a=2016b+1
Bài 1 tìm x
a) (2x-3)^2 - (2x+5)^2 = 10
b) 4(x+1)^2+(2x-1)^2+8(x+1)(x-1)= 11
c) (x+5)^2 = 45+x^2
d) (2x-3)^2-(2x-1)^2= -3
e) (x-1)^2-(5x-3)^2= 0
Ai xong trước mình tick luôn nha đang cần gấp lắm ạ
tìm x :
4 ( x + 1 ) mũ 2 + ( 2x - 1 ) mxu 2 - 8 ( x - 1 ) ( x - 1 ) = 11
tìm x,biết:
a, 3(x-3)-6x=0
b, 2x(x-15)+2x
c, 2(x-3)+3x=9
d, x(x-11)+2(x-11)=0
e,x(x+2)+8=x^2
f, 8(x+1)+2x=-2
g,12-3(x+2)=0
Tìm x biết:
4.(x+1)^2+(2x-1)^2-8(x-1)(x+1)=11
