Question

Type the correct answer in each box.

Solve the quadratic equation. Write your solutions in the blanks, starting with the smaller value.

4x2– 7 = 9

Answer 1

-2, 2

Explanation:

4x²=9+7

4x²=16

x²=4

x=+/-√4

x= - 2 ,or x = +2

Answer 2

x = ±2 (x = 2 or -2)

Start with the equation
`4x^2-7=9`.

Add 7 on both sides of the equation to get
`4x^2=16`.

Divide both sides by 4 to get
`x^2=4`.

Now, find the square root of each side to get a final answer of
`x=±2`, which means x can be either 2 or -2.