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\(a,56-36:\left(-9\right)+3.\left(-2\right)^2\)
\(=56+4+12=72\)
\(b,36-16\left[2\left(14-15\right)^{21}\right]+14\)
\(=36-12\left[2-\left(-1\right)^{21}\right]+14\)
\(=36-16\left(2+1\right)+14\)
\(=36-48+14=2\)
\(c,2\left(-3\right)^2-3\left(-2\right)^3.\left(-2\right)^3+8\)
\(=2.9-3.8.8+8=218\)
\(d,\left(-8\right)25\left(-2\right)4\left(-5\right)125=\left(-8\right)125\left(-2\right)\left(-5\right)25.4=-1000.10.100=-1000000\)
\(56-36:\left(-9\right)+3.\left(-2\right)^2\)
\(=56+4+3.4\)
\(=60+12=72\)
\(36-16.\left|2-\left(14-15\right)^{21}\right|+14\)
\(=36-16.\left(2+1\right)+14\)
\(=36-48+14=2\)
\(2.\left(-3\right)^2-3.\left(-2\right)^3.\left(-2\right)^3+8\)
\(=2.9-3.8.8+8\)
\(=18-192+8=-166\)
\(\left(-8\right).25.\left(-2\right).4.\left(-5\right).125\)
\(=\left[\left(-8\right).125\right].\left(25.4\right).\left[\left(-5\right).\left(-2\right)\right]\)
\(=\left(-1000\right).100.\left(-10\right)=1000000\)
1) x - 36 + 12 = - x+ 10
=> x + x = 10 + 24
=> 2x = 34
=> x = 34/2 = 17
2) (x + 15) - (11 - x) = (-2)2
=> x + 15 - 11 + x = 4
=> 2x = 4 - 4
=> 2x = 0
=> x = 0
3) 40 - 4x2 = (-6)2
=> 40 - 4x2 = 36
=> 4x2 = 40 - 36
=> 4x2 = 4
=> x2 = 1
=> x = \(\pm\)1
4) (-50) + 10x2 = (-25) x |-2|
=> -50 + 10x2 = -50
=> 10x2 = -50 + 50
=> 10x2 = 0
=> x2 = 0
=> x = 0
5) |x + 1| = 2020
=> \(\orbr{\begin{cases}x+1=2020\\x+1=-2020\end{cases}}\)
=> \(\orbr{\begin{cases}x=2019\\x=-2021\end{cases}}\)
6) (x + 1)5 + 8 = 0 (xem lại đề)
7) (-20) + x3 : 16 = -24
=> x3 : 16 = -24 + 20
=> x3 : 16 = -4
=> x3 = -4 . 16
=> x3 = -64 = (-4)3
=> x = -4
9) x14 = x17
=> x14 - x17 = 0
=> x14(1 - x3) = 0
=> \(\orbr{\begin{cases}x^{14}=0\\1-x^3=0\end{cases}}\)
=> \(\orbr{\begin{cases}x=0\\x=1\end{cases}}\)
10) (-36) + (1 - x)2 = 0
=> (1 - x)2 = 36
=> (1 - x)2 = 62
=> \(\orbr{\begin{cases}1-x=6\\1-x=-6\end{cases}}\)
=> \(\orbr{\begin{cases}x=-5\\x=7\end{cases}}\)
3636: ( 12x-91) = 36
12x-91 =3636:36
12x-91 =101
12x =101+91
12x =192
x =192:12
x =16
( x : 23 + 45 ) x 67 = 8911
x : 23 + 45 =8911:67
x : 23 + 45 =133
x:23 =133-45
x:23 =88
x =88x23
x =2024
bạn tự suy nghĩ nhé,mik bận học rùi
14 + x3 = 22 . 1000
14 + x3 = 22
x3 = 22 - 14 = 8
=> x = 2
125 - 5.(x - 3) = 102
5.(x - 3) = 25
x - 3 = 5
x = 8
3[2x+1]=5+10
3[2x+1]=15
2x+1=15:3
2x+1=5
2x+1=22+1
=>x=2
5x+1=36-10
5x+1=26
5x+1=52+1
=>x=2
1)\(14+x^3=22.100^0\Rightarrow14+x^3=22.1\Rightarrow14+x^3=22\Rightarrow x^3=22-14\Rightarrow x^3=8\Rightarrow x=2\)
2)\(125-5\left(x-3\right)=10^2\Rightarrow125-5x+15=100\Rightarrow5x=125-100+15\Rightarrow5x=40\Rightarrow x=8\)
3) Ta có: x chia hết cho 12 và x nhỏ nhất khác 0 => x = 12
4) 48 chia hết cho x ; 36 chia hết cho x và 3 < x < 14
=> \(x\in UC\left(36;48\right);3< x< 14\Rightarrow x=\left\{4;6;12\right\}\)
b) 53 . 93 + 47 . 93 - 79 . 62 - 38 . 79
= 93 . ( 47 + 53) . 79 . ( 62 - 38 )
= 93 . 100 . 79 . 24
= 9300 . 1896
= 17632800
\(x^2-\left(-\frac{5}{36}\right)=\frac{14}{36}\)
\(x^2+\frac{5}{36}=\frac{14}{36}\)
\(x^2=\frac{14}{36}-\frac{5}{36}\)
\(x^2=\frac{1}{4}\)
\(\Rightarrow x\in\left\{\frac{-1}{2};\frac{1}{2};\frac{1}{-2};\frac{-1}{-2}\right\}\)
Vậy \(x\in\left\{\frac{-1}{2};\frac{1}{2};\frac{1}{-2};\frac{-1}{-2}\right\}\)
\(x^2-\left(\frac{-5}{36}\right)=\frac{14}{36}\Rightarrow x^2=\frac{14}{36}+\left(\frac{-5}{36}\right)=\frac{14}{36}-\frac{5}{36}=\frac{9}{36}=\frac{1}{4}\)
\(\Rightarrow x^2=\frac{1}{4}\Rightarrow x^2=\pm\left(\frac{1}{2}\right)^2\)
vậy x = \(\frac{1}{2}\) hoặc x = \(\frac{-1}{2}\)