Lesson 3.4: Completing The Square Answers

Which of the following describes the relationship between b and c?

x2 – 10x + ⇒ 25

x2 + ⇒ 12x + 36

x2 + x + ⇒ 1/16

Given 2x² = -8, x is -2X 2✔ 2i or -2i4i or -4i.

x + ✔ 1/4X 1/22/3 =

Question text not available

Choose the solutions to the quadratic equationx2 – 8x – 9 = 0.

Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

Add ⇒ 16 to each side x2 – 8x = 9 to complete the square.

Now that you have x² - 8x + 16 = 9 + 16, apply the square root property to the equation. ✔ (x – 4)² = 25(x + 16)² = 25X (x – 4)² = 9 (x + 16)² = 9

Solve 2x2 + x − 4 = 0. x2 + x + = 0 x2 + 12x + = 2 + (x + )2 =

Question text not available

Choose the solution to the equation.

Solve 2x2 + x − 4 = 0. x2 + x + = 0 x2 + 12x + = 2 + (x + )2 =

Solve 2x2 + x − 4 = 0. x2 + x + = 0 x2 + 12x + = 2 + (x + )2 =