Solving Quadratic Square Root

What is the solution of the equation a² – 60 = 21?

• positive or negative 4

• positive or negative 6

• positive or negative 7

• positive or negative 9

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

n² = 0?

• 0

• 1

• 2

• 3

John is solving for equation (3y – 3)² – 144 = 0 by extracting square roots. Which of the following solution will arrive?

• 5 and –3

• –5 and 3

• 7 and –4

• –12 and 3

Solve by taking square roots:
5m² + 1 = 6

• m = 0

• m = 1 or -1

• m = √7

• m = 7/5 m = -7/5

2x²=100

• x = √25

• x = ±5√2

• x = √100

• x = ±√5

x² = 8

• x = ±4

• x = ±2√2

• x = ±4√2

• x = ±√4

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

• x = + 7

• x = + 8

• x = + 9

• x = + 10

Solve using square roots.

• ±81

• ±9

• ±3

• No real solution