a, Ta có: 3 x = 3 2  nên x = 2

b, Ta có: 5 x = 5 3  nên x = 3

c, Ta có:  3 x + 1 = 3 2  nên x +1 = 2, do đó x = 1

d, Ta có:  6 x - 1 = 6 2 nên x - 1 = 2, đo đó x = 3

e) Ta có:  3 2 x + 1 = 3 3  nên 2x +1 = 3, do đó x = 1

f) Ta có:  x 50 = x  nên  x 50 - x = 0 , do đó  x x 49 - 1 = 0  = 0

Vì thế x = 0 hoặc x = 1

 KẾT QUẢ : 29232 nha bạn 

12180+8700+6786+1566=29232

Mà các bạn ghi rõ cách làm hộ mik với

a, 324 + 68 - 174 + 93 + 132 

\(=\left(324-174\right)+\left(68+132\right)+93\)

\(=150+200+93\)

\(=443\)

b, 68 x 125 x 16 x 5 

\(=68x5x25x80\)

\(=1700x400\)

\(=680000\)

\(\dfrac{637\times527-189}{526\times637+448}\)

\(=\dfrac{637\times\left(526+1\right)-189}{526\times637+448}\)

\(=\dfrac{637\times526+637-189}{526\times637+448}\)

\(=\dfrac{637\times526+448}{526\times637+448}\)

\(=\dfrac{1}{1}\)

\(=1\)

\(\dfrac{\left(637\cdot527-189\right)}{\left(526\cdot637+448\right)}\)

\(=\dfrac{\left(637\cdot526+637-189\right)}{\left(526\cdot637+448\right)}\)

\(=\dfrac{637\cdot526+448}{637\cdot526+448}=1\)

nhak lên các bạn ơi giúp mk đi

    526 x 637 + 448               335510

---------------------------- = ------------------------ = 1 

    637 x 527 -189               335510

Hok tốt nhé

# EllyNguyen #

526 x 637 + 448 / 637 x 527 - 189

= 526 x 637 + 448 / 637 x ( 526 + 1 ) - 189

= 526 x 637 + 448 / 637 x 526 + 637 - 189

= 526 x 637 + 448 / 637 + 526 + 448

= 1

k mik nhé

a) \(x^2-xz-9y^2+3yz\)

\(=\left(x^2-9y^2\right)-\left(xz-3yz\right)\)

\(=\left(x-3y\right)\left(x+3y\right)-z\left(x-3y\right)\)

\(=\left(x-3y\right)\left(x+3y-z\right)\)

c) \(x^3+2x^2-6x-27\)

\(=\left(x^3-27\right)+\left(2x^2-6x\right)\)

\(=\left(x-3\right)\left(x^2-3x+9\right)+2x\left(x-3\right)\)

\(=\left(x-3\right)\left(x^2-3x+9+2x\right)\)

\(=\left(x-3\right)\left(x^2-x+9\right)\)

b) \(x^3-x^2-5x+125\)

\(=\left(x^3+125\right)-\left(x^2+5x\right)\)

\(=\left(x+5\right)\left(x^2-5x+25\right)-x\left(5+x\right)\)

\(=\left(x+5\right)\left(x^2-5x+25-x\right)\)

\(=\left(x+5\right)\left(x^2-6x+25\right)\)

\(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{637\times\left(526+1\right)-189}{526\times637+448}\)

\(=\frac{637\times526+637-189}{526\times637+448}\)

\(=\frac{637\times526+448}{526\times637+448}\)

\(=1\)

\(\frac{677\times874+251}{678\times874-623}\)

\(=\frac{677\times874+251}{\left(677+1\right)\times874-623}\)

\(=\frac{677\times874+251}{677\times874+874-623}\)

\(=\frac{677\times874+251}{677\times874+251}\)

\(=1\)

\(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{526\times637+637-189}{526\times637+448}=\frac{526\times637+448}{526\times637+448}=1\)

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