Solving Quadratics with Difference of Squares

• 10

• -10

• 1

• -1

• 0

Factor completely: 49x² - 25y²

• (7x + 5y)(7x - 5y)

• (7x +5y)(7x +5y)

• (7x² + 5y²)(7x² - 5y²)

• Prime

Out of the following expressions, which one can factor using difference of two squares?

• 144x² - 49y²

• x² + 4x - 12

• 100x² + 20x + 1

• 14x - 16

Factor x² - 25

• ( x + 5 ) ( x - 5 )

• ( x - 5 ) ( x - 5 )

• ( x + 5 ) ( x + 5 )

• Prime

Factor and solve:

• (4x - 9)(4x + 9)

  x = {-9/4, 9/4}

• (2x - 3)(2x + 3)

  x = {-2/3, 3/2}

• (2x - 3)²

  x = {3/2}

• (2x + 3)²

  x = {-3/2}

Solve
16a² - 9 = 0

• a = ^-3/₄, ³/₄ 

• a = ^-4/₃, ⁴/₃ 

• a = ^-9/₁₆, ⁹/₁₆ 

• a = ^-16/₉, ¹⁶/₉ 

Solve:  x² - 81 = 0 

• 9

• 9, -9

• 3, -3, 9, -9

• None of the above

Factor

25x² - 81

• (5x - 9)(5x + 9)

• (5x - 9)(5x - 9)

• (5x + 9)(5x + 9)

• Cannot be factored

Completely Factor:
25x² - 81

• (5x - 9)²

• (5x + 9) (5x - 9)

• 25 (x - 9)²

• (9x + 5) (9x - 5)

Factor completely: x² - 9y²

• (x + 9y)(x - 9y)

• (x + 3y)(x + 3y)

• (x + 3y)(x - 3y)

• Prime