\(\left(x-\frac{3}{2}\right).\left(x^2+1\right)=0\)
lm ơn giúp mik vs
\(\left(\frac{2x-x^2}{2x^2+8}-\frac{2x^2}{x^3-2x^2+4x-8}\right)\left(\frac{2}{x^3}+\frac{1-x}{x}\right)\) ) ae giúp mik vs nhé mik cần gấp kết quả vs cách lm ngắn gọn nhất của bài này ạ
Tìm x biết:
a) \(\left(x+\frac{1}{2}\right).\left(x-\frac{3}{4}\right)=0\)
b) \(\left(\frac{1}{2}.x-3\right).\left(\frac{2}{3}x+\frac{1}{2}\right)=0\)
c) \(\frac{2}{3}-\frac{1}{3}.\left(x-\frac{3}{2}\right)-\frac{1}{2}\left(2x+1\right)=5\)
d) \(4x-\left(x+\frac{1}{2}\right)=2x-\left(\frac{1}{2}-5\right)\)
MONG CÁC BN GIÚP ĐỠ MK BÀI NÀY , MK ĐANG CẦN RẤT GẤP GIẢI CHI TIẾT RA GIÚP MK VS NHÉ !!!MK RẤT CẢM ƠN!
Tìm x biết:
a) \(\left(x+\frac{1}{2}\right).\left(x-\frac{3}{4}\right)=0\)
b) \(\left(\frac{1}{2}x-3\right).\left(\frac{2}{3}x+\frac{1}{2}\right)=0\)
c) \(\frac{2}{3}-\frac{1}{3}.\left(x-\frac{3}{2}\right)-\frac{1}{2}\left(2x+1\right)=5\)
d) \(4x-\left(x+\frac{1}{2}\right)=2x-\left(\frac{1}{2}-5\right)\)
MONG CÁC BN GIÚP ĐỠ MK BÀI NÀY , MK ĐANG CẦN RẤT GẤP
GIẢI CHI TIẾT RA GIÚP MK VS NHÉ!!!!MK RẤT CẢM ƠN![]()
a.
\(\left(x+\frac{1}{2}\right)\times\left(x-\frac{3}{4}\right)=0\)
TH1:
\(x+\frac{1}{2}=0\)
\(x=-\frac{1}{2}\)
TH2:
\(x-\frac{3}{4}=0\)
\(x=\frac{3}{4}\)
Vậy \(x=-\frac{1}{2}\) hoặc \(x=\frac{3}{4}\)
b.
\(\left(\frac{1}{2}x-3\right)\times\left(\frac{2}{3}x+\frac{1}{2}\right)=0\)
TH1:
\(\frac{1}{2}x-3=0\)
\(\frac{1}{2}x=3\)
\(x=3\div\frac{1}{2}\)
\(x=3\times2\)
\(x=6\)
TH2:
\(\frac{2}{3}x+\frac{1}{2}=0\)
\(\frac{2}{3}x=-\frac{1}{2}\)
\(x=-\frac{1}{2}\div\frac{2}{3}\)
\(x=-\frac{1}{2}\times\frac{3}{2}\)
\(x=-\frac{3}{4}\)
Vậy \(x=6\) hoặc \(x=-\frac{3}{4}\)
c.
\(\frac{2}{3}-\frac{1}{3}\times\left(x-\frac{3}{2}\right)-\frac{1}{2}\times\left(2x+1\right)=5\)
\(\frac{2}{3}-\frac{1}{3}x+\frac{1}{2}-x-\frac{1}{2}=5\)
\(\left(\frac{1}{2}-\frac{1}{2}\right)-\left(\frac{1}{3}x+x\right)=5-\frac{2}{3}\)
\(-\frac{4}{3}x=\frac{13}{3}\)
\(x=\frac{13}{3}\div\left(-\frac{4}{3}\right)\)
\(x=\frac{13}{3}\times\left(-\frac{3}{4}\right)\)
\(x=-\frac{13}{4}\)
d.
\(4x-\left(x+\frac{1}{2}\right)=2x-\left(\frac{1}{2}-5\right)\)
\(4x-x-\frac{1}{2}=2x-\frac{1}{2}+5\)
\(4x-x-2x=\frac{1}{2}-\frac{1}{2}+5\)
\(x=5\)
Giải giúp mik vs đap cần gấp . Cảm ơn mn. Giải cho mik bài 1 cx đc
1/ Rút gọn
A=\(\sqrt{7}-4\sqrt{3}+\sqrt{4}-2\sqrt{3}\)
B=\(\left(2+\frac{5-\sqrt{5}}{\sqrt{5}-1}\right)\) \(\left(2-\frac{5+\sqrt{5}}{\sqrt{5}+1}\right)\)
C=\(\left(\sqrt{3}+1\right)\) \(\left(\frac{\sqrt{14}-6\sqrt{3}}{5+\sqrt{3}}\right)\)
2/Cho P=\(\left(\sqrt{x-\frac{1}{\sqrt{x}}}\right)\):\(\left(\frac{\sqrt{x}-1}{\sqrt{x}}+\frac{1-\sqrt{x}}{x+\sqrt{x}}\right)\)
a/ cmr: P>0, V x >0, x\(\ne\)1
b/Tính GT P khi x\(\frac{2}{2+\sqrt{3}}\)
cm pt có no
1, \(x^2-2\left(m-1\right)\)\(x-3-m=0\) 2, \(x^2+\left(m+1\right)x+m=0\)
3, \(^{x2-\left(2m-3\right)x+m^2-3m=0}\) 4, \(^{x2+2\left(m+2\right)x-4m-12=0}\)
5, \(x^2-\left(2m+3\right)x+m^2+3m+2=0\) 6, \(^{x2-2x-\left(m-1\right)\left(m-3\right)=0}\)
Mik cần rất rất gấp nhak
Lm ơn giúp mik. Thanks trc
Làm hộ 1 cái thôi , mấy cái kia làm y hệt
\(1,x^2-2\left(m-1\right)x-3-m=0\)
Có: \(\Delta'=\left(m-1\right)^2+3+m\)
\(=m^2-2m+1+3+m\)
\(=m^2-m+4\)
\(=\left(m-\frac{1}{2}\right)^2+\frac{15}{4}>0\forall m\)
=> Pt luôn có nghiệm vs mọi m
\(\left(\dfrac{1}{5}x^3y\right).\left(-5xy^3\right)^0.\left(xy^3\right)^2=\)
lm hộ vs
\(=\dfrac{1}{5}x^3y\cdot x^2y^6=\dfrac{1}{5}x^5y^7\)
\(=\dfrac{1}{5}.\left(x^3x^2\right)\left(yy^{3.2}\right)=\dfrac{1}{5}x^5y^7\)
Mik cần gấp. ai giúp mik vs
x=\(\left(\frac{3}{4}\right)^3:\left(\frac{3}{4}\right)^2:\left(\frac{-2}{3}\right)^3\)
\(x=\left(\frac{3}{4}\right)^{3-2}\)
\(=\left(\frac{3}{4}\right):\left(\frac{-2}{3}\right)^3\)
\(=\frac{-81}{32}\)
Chúc bạn học tốt ^^!
tìm x :
\(2\left(x-1\right)+3\left(x-3\right)=-2\)
\(\frac{x-1}{3}=\frac{x-2}{2}\)
giúp mik nhé mik cảm ơn sáng mai mik sẽ xem nhé
a) 2(x-1)+3(x-3)=-2 b) x-1/3=x-2/2
2x-2+3x-9=-2 2 (x-1)=3(x-2)
(2x+3x)+(-2-9)=-2 2x-2=3x-6
5x+(-11)=-2 2x-3x=-6+2
5x=-2+11 -1x=-4
5x=9 x=4
x=1,8
Nhớ nha!
\(\dfrac{1}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+2\right)}\) \(\dfrac{1}{\left(\sqrt{X}-1\right)\left(3-\sqrt{X}\right)}\)
GIUP MIK VS NHA,CẢM ƠN
`1/((sqrtx-1)(sqrtx+2))-1/((sqrtx-1)(3-sqrtx))`
`=1/((sqrtx-1)(sqrtx+2))+1/((sqrtx-1)(sqrtx-3))`
`=(sqrtx-3+sqrtx+2)/((sqrtx-1)(sqrtx+2)(sqrtx-3))`
`=(2sqrtx-1)/((sqrtx-1)(sqrtx+2)(sqrtx-3))`