bang 20

5 x 2 +10

= 10 + 10

= 20.

Chúc bạn học giỏi !

5x2+10

=10+10

=20

=2x5.kkakaakakak

bằng 5 nhân 2.

5 x 2 = 10 = 5 + 5 5 x 2 = 10 = 2 x 5

Chọn B

x=-căn bậc hai(13)-3, x=căn bậc hai(14)-2

\(10:5=2\)

\(5x2=10\)

K mk nha !

10:5=2

5x2=10

ủng hộ nha

Giải:

10 : 5 = 2

5 x 2 = 10

1, \(2x^2+4x=2x\left(x+2\right)\)

2, \(15x^3+5x^2-10x=5x\left(3x^2+x-2\right)=5x\left(x-\dfrac{2}{3}\right)\left(x+1\right)\)

3) \(5x^2\left(x-2y\right)+15x\left(x-2y\right)=\left(5x^2+15x\right)\left(x-2y\right)=5x\left(x+3\right)\left(x-2y\right)\)

4) \(3\left(x-y\right)+5x\left(y-x\right)=\left(x-y\right)\left(3-5x\right)\)

5) \(5x^2-10x=5x\left(x-2\right)\)

6) \(3x-6y=3\left(x-2y\right)\)

7) \(25x^2+5x^3+x^2y=x^2\left(25+5x+y\right)\)

8) \(14x^2y-21xy^2+28x^2y^2=7xy\left(2x-3y+4xy\right)\)

9) \(x\left(y-1\right)-y\left(y-1\right)=\left(x-1\right)\left(y-1\right)\)

10) \(10x\left(x-y\right)-8y\left(y-x\right)=\left(10x+8y\right)\left(x-y\right)=2\left(5x+4y\right)\left(x-y\right)\)

\(1,=2x\left(x+2\right)\\ 2,=5x\left(3x^2+x-2\right)\\ 3,=\left(x-2y\right)\left(5x^2+15x\right)=5x\left(x+3\right)\left(x-2y\right)\\ 4,=\left(x-y\right)\left(3-5x\right)\\ 5,=5x\left(x-2\right)\\ 6,=3\left(x-2y\right)\\ 7,=5x^2\left(5+x+y\right)\\ 8,=7xy\left(2x-3y+4xy\right)\\ 9,=\left(y-1\right)\left(x-y\right)\\ 10,=\left(x-y\right)\left(10x+8y\right)=2\left(5x+4y\right)\left(x-y\right)\)

Bạn đăng câu này r mà

\(\Leftrightarrow\left(x+3\right)\left(10-5x\right)=0\)

=>x=-3 hoặc x=5

10(x+3)-5x(x+3)=0

(x+3)(10-5x)=0

x+3=0 hoặc 10-5x=0

x=-3.           2-x=0.    x=2

24,5

duyệt đi

1+1+1x2+2:4+5x2+10

=1+1+2+0,5+10+10

=2+2+0,5+10+10

=4+0,5+10+10

=4,5+10+10

=14,5+10

=24,5

= 24,5 duyệt đi