bài1
d)\(\left(-45,7\right)+[\left(+5,7\right)+\left(+5,75\right)+\left(-0,75\right)]\)
e)\(11,26-5,13\div\left(5\frac{5}{18}-1\frac{8}{9}\cdot1,25+1\frac{16}{63}\right)\)
j)\(\sqrt{8^2+6^2}\sqrt{16}+\frac{1}{2}\cdot\sqrt{\frac{4}{5}}\)
h)\(\left(-1+3\frac{2}{5}+\frac{1}{4}\right)\cdot\left(-4\right)\)
cac ban giupmminh nha ngay mai minh kiem tra mon toan
a,-12:(3/4-5/6)^2
,b,10.\(\sqrt{0.01}.\sqrt{\dfrac{16}{9}+3\sqrt{49}-\dfrac{1}{6}\sqrt{4}}\)
c,x/6=y/3=z/2 và x-2y+4z=8
d,|1/4+x|-1/3=2/5
giup minh nha bài 1 tim x
1 \(\sqrt{x}=1\)
2) \(\sqrt{x}=3\)
3)\(\sqrt{x+1}=11\)
4)\(\sqrt{x-2}=12\)
5)\(\sqrt{2-3x}=9\)
6)\(\sqrt{3x+4}=5\)
Tìm x,tính nhanh:
a.\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7.\)
b.\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
c.\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)
d.\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)
\(x^2+5x+6=3x+3\cdot4+2x-9\)
\(2\sqrt{x}+8x+5=5x-4+3x+19\)
\(5\sqrt{x}+2x-8=5x+4-3x-19\)
\(2x^2+5z+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)
\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
\(2\sqrt{3x}+11x-18=5x+2+6\cdot\sqrt{3x}+6x-21\)
tìm x biết:
a)\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)
b)\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
c)\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)
d)\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)
1. Chứng minh:
\(\frac{1}{2}+\frac{1}{3\sqrt{2}}+\frac{1}{4\sqrt{3}}+\frac{1}{5\sqrt{4}}+...+\frac{1}{2016\sqrt{2015}}<\frac{88}{45}\)
2. Rút gọn: A= \(\left(\frac{1+2x}{4+2x}-\frac{x}{3x-6}+\frac{2x^2}{13-3x^2}\right)\times\frac{24-12x}{6+13x}\)
3, Cho 2x;3y tỉ lệ nghịch với 3,4;x và z tỉ lệ thuận với 4,5; x-2y+3z=1. Tính x-y-z
4. Tìm x: \(\left(2x-3\right)^2-2\left(3x+1\right)^2=2x\left(x-2\right)+\left(x-1\right)\left(x+2\right)\)
bài 1: tìm x, biết:
a)\(\sqrt{x}\)=7
b)\(\sqrt{x+1}\)=11
c)\(\sqrt{x-3}\)=13
d)\(\sqrt{3x+4}\)=5
e)\(\sqrt{3x+\frac{1}{2}}\)\(-\frac{3}{2}\)=0
Bài 1: Tìm x, biết:
a) \(\sqrt{1,69}.(2.\sqrt{x}+\sqrt{81/121})=13/10\)
b) \((2x^2-3).(3x^2-1/0,12).(x^2+1)=0\)
c) \(|2/5.\sqrt{x}-1/20|-3/4=1/5\)
d) \(x-5\sqrt{x}=0\)
e) \(2x^7=3x^9\)
f) \(x^6=4x^8\)
Giải hộ mik với nha! Thank you