Solve by Completing the Square with a Not One

What mathematical process did they use?

• Differentiation

• Quadratic Formula

• Factoring

• Completing the Square

Tags

CCSS.HSA-REI.B.4B

What do you do to the b value to correctly complete the square?

• square it

• divide it by 2 and square the result

• divide it by 2 and take the square root of the result

• divide it by 2 only

Tags

CCSS.HSA-REI.B.4B

What are the steps to solving this by completing the square?

• Take the square root of both sides of the equation

• Subtract 21 from both sides of the equation

• Rewrite the left hand side as a (binomial)²

• Add 25 to both sides of the equation

• Subtract 5 from both sides of the equation

Tags

CCSS.HSA-REI.B.4B

We are going to solve this problem by completing the square. To get 1 in front of the quadratic term, we need to divide both sides by what number?

• 4

• 40

• 44

Tags

CCSS.HSA-REI.B.4B

What is the next step to solve by completing the square?

• Divide both sides by a.

• Factor the perfect square trinomial.

• Take the square root of each side.

Tags

CCSS.HSA-REI.B.4B

What number should go in the blank in the last step of the picture?

• 25

• -25

• 5

• -5

Tags

CCSS.HSA-REI.B.4B

Step 2 says to get the constants on a side by themselves. To this we need to...

• subtract x² from both sides.

• subtract 10x from both sides.

Tags

CCSS.HSA-REI.B.4B

What is the first step to solving THIS equation by completing the square?
a² + 10a + 21 = 0

• Set the equation equal to zero

• Divide 10 by 2 and add the result to both sides

• Add a² and 10a together

• Subtract the 21

Tags

CCSS.HSA-REI.B.4B

Find the values for n.

• -4, 2

• -2, 4

• -16

• -4

Tags

CCSS.HSA-REI.B.4B