Solve {l}{(-1)^2020-(-3)+(1/2)^-1}{+sqrt{9}}

$$\left. \begin{array} { l } { ( - 1 ) ^ { 2020 } - ( - 3 ) + ( \frac { 1 } { 2 } ) ^ { - 1 } } \\ { + \sqrt { 9 } } \end{array} \right.$$

Evaluate

$$9$$

Solution Steps

Calculate -1 to the power of 2020 and get 1.

$$1-\left(-3\right)+\left(\frac{1}{2}\right)^{-1}+\sqrt{9}$$

The opposite of -3 is 3.

$$1+3+\left(\frac{1}{2}\right)^{-1}+\sqrt{9}$$

Add 1 and 3 to get 4.

$$4+\left(\frac{1}{2}\right)^{-1}+\sqrt{9}$$

Calculate \frac{1}{2} to the power of -1 and get 2.

$$4+2+\sqrt{9}$$

Add 4 and 2 to get 6.

$$6+\sqrt{9}$$

Calculate the square root of 9 and get 3.

$$6+3$$

Add 6 and 3 to get 9.

$$9$$

Factor

$$3^{2}$$