Quiz about Solving Quadratic Square Root

Question 1

How many real solution/s or root/s does the equation

n² = 0?

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 2

What are the roots / solutions of the quadratic equation equation 2x² + 3 = 101 ?

Accepted Answer

x = + 7

Answer

x = + 8

Answer

x = + 9

Answer

x = + 10

Question 3

Solve by taking square roots.
$$x^2=81$$

Accepted Answer

$$\left\{\pm\ 9\right\}$$

Answer

$$\left\{40.5\right\}$$

Answer

$$\left\{9\right\}$$

Answer

$$\left\{0,\ 9\right\}$$

Question 4

Solve by taking square roots.
$$x^2-225=0$$

Hint: Isolate $$x^2.$$

Accepted Answer

$$\left\{\pm\ 15\right\}$$

Answer

$$\left\{\pm\ 14\right\}$$

Answer

$$\left\{15\right\}$$

Answer

$$\left\{112.5\right\}$$

Question 5

Solve by taking square roots.
$$x^2-64=0$$

Accepted Answer

$$\left\{\pm\ 8\right\}$$

Answer

$$\left\{\pm\ 32\right\}$$

Answer

$$\left\{\pm\ 16\right\}$$

Answer

$$\left\{\pm\ 4\right\}$$

Question 6

Find the zero(s) by taking square roots.

Accepted Answer

$$\left\{\pm\sqrt{7}\right\}$$

Answer

$$\left\{7\right\}$$

Answer

$$\left\{-7\right\}$$

Answer

$$\left\{\pm\ 7\right\}$$

Question 7

FInd the solutions(s) by taking square roots.
$$x^2=20$$

Accepted Answer

$$\left\{\pm\ 2\sqrt{5}\right\}$$

Answer

$$\left\{\pm\ 20\right\}$$

Answer

$$\left\{\sqrt{20}\right\}$$

Answer

$$\left\{\pm\ 4.5\right\}$$

Question 8

Find the solution(s) by taking square roots.
$$\left(x+5\right)^2=0$$

Accepted Answer

$$\left\{-5\right\}$$

Answer

$$\left\{\pm\ 0\right\}$$

Answer

$$\left\{\pm\ \sqrt{5}\right\}$$

Answer

$$\left\{\pm\ 5\right\}$$

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