Solving Quadratics (Square Roots & Graphing)

Solve.

• x = -3, x = -1

• x = 3, x = 0

• x = -3, x = 1

• x = -1, x = 4

Solve.

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• No real solution

2d² = 8

• d = 4

• d = 2

• d = -4, d = 4

• d = -2, d = 2

Solve for x:

(x + 6)² = 49

• x = 7, x = 12

• x = ±7

• x = 1, x = -13

• x = 43, x = -55

When solving a quadratic equation, when do you use the plus or minus (±) symbol?

• After taking the square root of both sides

• After adding the square to both sides

• After undoing addition/subtraction

• After setting the equation equal to zero

• = $\pm$ 49

• x = = $\pm$ 8

• x = $\pm$ 7

• x = $\pm$ 7i

• x = ±764

• x = ±8

• x = ±7

• No real solution

Solve using square roots.

• x = ±81

• x = ±9

• x = ±3

• No real solution

Solve using square roots.

• $x=±i\sqrt{-3}$

• $x=±\sqrt{3}​$

• $x\ =\ -3$

• $x=±i\sqrt{3}$

Solve using square roots.

• $x=±\ \frac{1}{4}$

• $x=±\ \frac{9}{36}$

• $x=±\ \frac{1}{2}$

• $x=±\ \frac{1}{4}i$