Factoring Trinomials Using TI-84

This video tutorial demonstrates how to use the TI-84 calculator's table feature to factor trinomials of the form x^2 + Bx + C, where the coefficient of x^2 is 1. It provides two examples: factoring x^2 - 11x + 28 and x^2 + 2x - 48. The video explains how to set up the calculator, find factors of the constant term C that add up to the linear coefficient B, and identify the correct binomial factors. The tutorial emphasizes the use of negative factors when necessary and highlights the importance of checking the sum of factors.

What is the form of the trinomials discussed in the video?

• x^2 + Bx + C

• x^2 + Bx + C^2

• Ax^2 + Bx + C

• Ax^2 + Bx + C^2

What are the factors of x^2 - 11x + 28?

• (x - 2)(x - 14)

• (x - 4)(x - 7)

• (x + 2)(x + 14)

• (x + 4)(x + 7)

Which feature of the TI-84 is used to find factors of a number?

• Matrix feature

• Statistics feature

• Table feature

• Graph feature

What should the table start value be set to when using the TI-84 to find factors?

• 0

• 5

• 10

• 1

Tags

CCSS.HSA-REI.B.4B

What are the correct factors of 28 that add up to -11?

• -4 and -7

• 4 and 7

• 2 and 14

• -2 and -14

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the product of the factors -4 and -7?

• -11

• 11

• 28

• -28

What is the trinomial in the second example?

• x^2 - 2x + 48

• x^2 - 11x + 28

• x^2 + 11x - 28

• x^2 + 2x - 48

What are the factors of x^2 + 2x - 48?

• (x + 8)(x - 6)

• (x - 8)(x + 6)

• (x + 4)(x - 12)

• (x - 4)(x + 12)

Tags

CCSS.HSA-REI.B.4B

Which pair of numbers gives a product of -48 and a sum of 2?

• 8 and -6

• 6 and -8

• -6 and 8

• -8 and 6

Tags

CCSS.7.NS.A.1C

What is the sum of the factors 8 and -6?

• -2

• 2

• -14

• 14

Tags

CCSS.7.NS.A.1C