Mn giúp e nha e đang cần gấp
Giaỉ phương trình sau;
\(\sqrt[]{4x^2-4x+9}=3\)
e đang cần gấp mn giúp e nha=(((
Ta có: \(\sqrt{4x^2-4x+9}=3\)
\(\Leftrightarrow4x^2-4x=0\)
\(\Leftrightarrow4x\left(x-1\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=1\end{matrix}\right.\)
Giaỉ phương trình sau ; \(\sqrt[]{x^2-x+16}=4\)
giúp e nha mn e đang cần gấp =((((
\(\sqrt{x^2-x+16}=4\)
\(\Rightarrow x^2-x+16=16\\ \Rightarrow x^2-x=0\\ \Rightarrow x\left(x-1\right)=0\\ \Rightarrow\left[{}\begin{matrix}x=0\\x-1=0\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=0\\x=1\end{matrix}\right.\)
Ta có: \(\sqrt{x^2-x+16}=4\)
\(\Leftrightarrow x^2-x=0\)
\(\Leftrightarrow x\left(x-1\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=1\end{matrix}\right.\)
giúp e với mn!!!
e đang cần gấp >-<
Mn giúp e với ạ e đang cần gấp
mn giúp e với ạ, e đang cần gấp
mn giúp e với á e đang cần gấp
58.They have learned English since 2010.
59. It's time for you to go to school now.
60.She has bought that house since 5 years ago.
61.The car is too expensive for him to buy.
62. Who was this novel written by?
60&62 còn có thể có cách làm khác:
60.She has bought that house for 5 years.
62. Who was the author of this novel?
63. Lan is always forgetting her homework.
64. Tom is the worst Vietnamese speaker in his Vietnamese club.
65. Is the Temple of Literature surrounded by four busy streets?
66. Despite the rough sea, they still went to the island.
67. How far is it from your house to your school?
68, My brother used to go to school late when he was small.
69. Although it rained heavily, they still went out.
70. Some trees have been planted along the roads to the school by the children.
mn giúp e vs ạ, e đang cần gấp ạ
mn giúp e vs ạ e đang cần gấp helpppp
a, \(40x-20+45x-30=48x-36\Leftrightarrow37x=14\Leftrightarrow x=\dfrac{14}{37}\)
b, đk : x khác -3 ; 3
\(5x+15+4x-12=x-5\Leftrightarrow8x=-38\Leftrightarrow x=-\dfrac{19}{4}\)(tm)
c, \(\left[{}\begin{matrix}2x+3=0\\3x-1=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{3}{2}\\x=\dfrac{1}{3}\end{matrix}\right.\)