523-123:(16:2)x26+152.25

=523-123:8x26+152.25

=523-15.375x26+152.25

=523-399.75+152.25

=123.25+152.26

=275.5

k cho mk nha!

=523 - 123 : 8  * 26 + 152,25

= 523 - 15,375 * 26 +152,25

= 523 - 399,75 +152,25

= 123,25 + 152,25

=275,5

Vì x = -12 nên |x| = 12

a) 18 + |x| = 18 + 12 = 30;

b) 25 - |x| = 25 – 12 = 13;

c) |3+x| - |7| = |3 + (-12)| - 7  =  | 3+(-12)| - 7 = |-9| - 7 = 9 – 7 = 2

a: 18+|x|=18+12=30

b: 25-|x|=25-12=13

c: |3+x|-|7|=|3-12|-7=9-7=2

Ta có: \(C=\left(109-1^2\right)\left(108-2^2\right)\left(107-3^2\right)\cdot...\cdot\left(10-100^2\right)\)

\(=\left(109-1^2\right)\cdot\left(108-2^2\right)\cdot\ldots\cdot\left(100-10^2\right)\cdot\left(99-11^2\right)\cdot\ldots\cdot\left(10^2-100^2\right)\)

\(=\left(109-1^2\right)\cdot\left(108-2^2\right)\cdot\ldots\cdot\left(100-100\right)\cdot\left(99-11^2\right)\cdot\ldots\cdot\left(10^2-100^2\right)\)

\(=\left(109-1^2\right)\cdot\left(108-2^2\right)\cdot\ldots\cdot0\cdot\left(99-11^2\right)\cdot\ldots\cdot\left(10^2-100^2\right)\)

=0

     \(528+216\div2\times3\)

\(=528+108\times3\)

\(=528+324\)

\(=852\)

528 + 216 : 2 x 3 

=528 + 36

= 564 

lỗi đề

$x^4-12x^3+12x^2-12x+111$ tại $x=11$

$=11^4-12\cdot11^3+12\cdot11^2-12\cdot11+111$

$=14641-15972+1452-132+111$

$=100$

$(6x+1)^2+(6x-1)^2-2(1-6x)(6x-1)$

$=(6x+1)^2+(6x-1)^2+2(6x-1)^2$

$=(6x+1)^2+3(6x-1)^2$

$=36x^2+12x+1+3(36x^2-12x+1)$

$=36x^2+12x+1+108x^2-36x+3$

$=144x^2-24x+4$

$=4(36x^2-6x+1)$

$3(2^2+1)(2^4+1)(2^8+1)(2^{16}+1)$

$=3\cdot\dfrac{2^4-1}{2^2-1}\cdot\dfrac{2^8-1}{2^4-1}\cdot\dfrac{2^{16}-1}{2^8-1}\cdot\dfrac{2^{32}-1}{2^{16}-1}$

$=3\cdot\dfrac{2^{32}-1}{2^2-1}$

$=3\cdot\dfrac{2^{32}-1}{3}$

$=2^{32}-1$

Tính giá trị biểu thức:

a) x + (–  26), biết x = 6

Với x = 6 thì x + (–  26) = 6 + (–  26) = -20

b) – 15 +  y, biết y = – 25

Với y = -25 thì – 15 +  y = – 15 +  (-25) = - 40 

  3 x ( 100 - 4 x 25 )

= 3 x ( 100 - 100 )

= 3 x   0

= 0

Chúc bạn hok tốt !

3x(100-4xX)

thay x=25, ta đc:

3x(100-4x25)

=3x(100-100)

=3x0=0

Vậy x=0

nhớ tk mk nhé

Bài 1:

  (a x 1 - a : 1) x 26 x a

=(a - a) x 26 x a

= 0 x 26 x a

0

Bài 2:

  326 + 326 x 8 + 326

=326 x1 + 326 x 8 + 326 x 1

=326 x (1 + 8 + 1)

=326 x 10

=3260

Bài 3:

888 + 88 + 8 + 8 + 8 = 1000