0.00104

0.104

0.0104

1.04

4:2=8:4

8:3=7:9

6*7=9*4

7+5=8:4

$$\left(a+b\right)^2=a^2-2ab+b^2$$

$$\left(a+b\right)^2=a^2+2ab+b^2$$

$$\left(a+b\right)^2=a^2+ab+b^2$$

$$\left(a+b\right)^2=a^2+2ab-b^2$$

$$a^2-b^2=\left(a-b\right)\left(a-b\right)$$

$$a^2-b^2=\left(a+b\right)\left(a+b\right)$$

$$a^2-b^2=\left(a-b\right)\left(a^2+ab+b^2\right)$$

$$a^2-b^2=\left(a-b\right)\left(a+b\right)$$

(x-2)(x+2)

(x-4)(x+4)

(x-2)(x-4)

(x+4)(x+2)

$$\left(a+b\right)^3=a^3+3a^2b+3ab+b^3$$

$$\left(a+b\right)^3=a^3+a^2b+ab^2+b^3$$

$$\left(a+b\right)^3=a^3+3a^2b+3ab^2+b^2$$

$$\left(a+b\right)^3=a^3+3a^2b+3ab^2+b^3$$

$$\sin^2x\ +\cos^2x=1$$

$$1+tg^2x=\frac{1}{\cos^2x}$$

$$\sin^2x+\cos^2y=1$$

$$tgx\times\operatorname{ctg}x=1$$

$$\frac{1}{2}$$  

$$\frac{\sqrt{3}}{2}$$  

$$\frac{\sqrt{2}}{2}$$  

0

$$\frac{1}{2}$$  

$$\frac{\sqrt{2}}{2}$$  

$$\frac{\sqrt{3}}{2}$$  

1

(3x-4y)(3x+4y)

(3x+4y)(3x+4y)

(3x-4y)(3x-4y)

(3x-4x)(3x+4x)

-5

3

7

0

16

0

16 или 0

4 или - 4

1 или 16

1 или -17

-17 или -1

-1 или 17

5

0,5

10

3

-2

$$1+\sin2x$$  

$$1-\cos2x$$  

$$1-\sin2x$$  

$$1+\cos2x$$  

$$\cos^2x-\sin^2x$$  

1

$$2\sin x\cos x$$  

$$\sin x\cos x$$  

$$2\sin\alpha\cos\beta$$  

$$\sin\beta\cos\alpha-\cos\beta\sin\alpha$$  

$$\sin\alpha\cos\beta+\sin\beta\cos\alpha$$  

$$\sin\alpha\cos\beta-\sin\beta\cos\alpha$$  

9

12

11

6