BÀI TẬP TOÁN 8 KNTT LẦN 4

$$2x^2+1$$

$$3x$$

$$2x^2+x$$

$$3x^2+x$$

2

3

6

5

$$-\frac{1}{2}$$

1

2

4

$$-1$$

$$1$$

$$xy$$

$$x^2y$$

$$5x^3y^2$$

$$6x^3y^2$$

$$6x^2y$$

$$5x^2y^2$$

-2

2

0

-1

$$AB+AC$$

$$ABC$$

$$AB+BC$$

$$AB+C$$

$$AC+AD+BC+BD$$

$$AC+BD$$

$$AC+ADBC+BD$$

$$AC+AD+B$$

$$\left(A-B\right)^2=\left(A-B\right)\left(A+B\right)$$

$$A^2-B^2=\left(A-B\right)\left(A+B\right)$$

$$\left(A-B\right)^2=A^2-2AB+B^2$$

$$\left(A+B\right)^2=A^2+2AB+B^2$$

$$\left(A+B\right)^2=A^2-2AB-B^2$$

$$A^2-B^2=\left(A-B\right)\left(A+B\right)$$

$$\left(A-B\right)^2=A^2-2AB+B^2$$

$$\left(A+B\right)^2=A^2+2AB+B^2$$