Which method should I use to solve this quadratic equation?

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

Since this seems unfactorable and a=3 (not 1) quadratic formula works as the last resort.

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

Since a = 1 and b is even, completing the square is the way to go, if it is not factorable, which this is not.

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

Since the parentheses squared is isolated, taking the square root of both sides is the best method

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

This equation is very factorable

(x-5)(x+2)=0

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

you can choose either factoring (x-1)(x-5)

OR

completing the square because a=1 and b is even

Both are appropriate methods for this equation

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

a is not equal to 1 and this doesn't seem easily factorable.

There is also not a GCF

Quadratic formula is the last resort, and appropriate for this equation

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

If you factor out the GCF of 5, a=1 and b is even making it easy to use completing the square.

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

There is no "b" term. Therefore, isolating the squared term and taking the square root of both sides is the way to go.

Tags

CCSS.HSA-REI.B.4B

• Quadratic Formula

• Completing the square

• Factoring

• Square root method

Answer explanation

a=1 and b is even. Use completing the square since it is not obvious how to factor it.

Tags

CCSS.HSA-REI.B.4B