CP - Lesson: Solve Quadratics using Sq. Roots (pt 1)

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Solve Quadratic Equations using Square Roots
(part 1)

Objective: Solve simple quadratic equations.​

Multiple Select

Solve: $$x^2=36$$

(there are TWO answers)

• 6

• -6

• 18

• -18

• 13

REVIEW

Perfect Squares: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, ...

Equations with Square Roots

EXAMPLES

​Solve: x² = 121

​SIDEBAR

=

=

​Solve: x² = -25

Match

Match the equation with its solution.

• $$x^2=64$$

• $$x^2=16$$

• $$x^2=4$$

• $$x^2=256$$

• $$x=\pm8$$

• $$x=\pm4$$

• $$x=\pm2$$

• $$x=\pm16$$

Equations with Square Roots

EXAMPLES

​x² + 7 = 23

​3x² - 5 = 142

Multiple Choice

Solve: 5x² + 8 = 88

• $$\pm4$$

• $$\pm16$$

• $$\pm8$$

• $$\pm40$$

• $$\pm5$$

Equations with Square Roots

EXAMPLES

​(x + 2)² = 169

​(x - 6)² = 25

Multiple Select

Solve: (x + 7)² = 81

• 2

• -16

• -2

• 9

• 74

Equations with Square Roots

EXAMPLES

​(x + 8)² + 1 = 17

​(x - 4)² - 14 = 35

Multiple Select

Solve: (x + 1)² - 3 = 13

• 3

• -5

• 15

• 4

• -2

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