2022年中考数学专题：二次根式

$m^2+m^3=2m^5$

${(-2a^2)}^3=-6a^6$

${(a-b)}^2=a^2-b^2$

$\sqrt{6}÷\sqrt{2}=\sqrt{3}$

6

$2\sqrt{10}$

12

$9\sqrt{10}$

$\sqrt{2}+\sqrt{3}=\sqrt{5}$

$a^3\cdot a^2={\alpha }^6$

${\left(a^3\right)}^2=a^6$

$a^2-b^2={(a-b)}^2$

0

1

2

$\frac{\sqrt{5}-1}{2}$

$x^2+x^3=x^5$

${(-a-b)}^2=a^2+2\mathit{ab}+b^2$

${\left(3x^3\right)}^2=6x^6$

$\sqrt{2}+\sqrt{3}=\sqrt{5}$

0

1

2

3

$\sqrt{16}=\pm 4$

${(-2)}^0=1$

$\sqrt{2}+\sqrt{5}=\sqrt{7}$

$\sqrt[3]{9}=3$

$\sqrt{2^2}=2$

$\sqrt{{(-2)}^2}=-2$

$\sqrt{2^2}=\pm 2$

$\sqrt{{(-2)}^2}=\pm 2$

${(-x^3)}^2=x^5$

$\sqrt{{(-x)}^2}=x$

${(-x)}^2+x=x^3$

${(-1+x)}^2=x^2-2x+1$

4

$\pm 4$

$2\sqrt{2}$

$\pm 2\sqrt{2}$