Equivalent expressions and factors

Which expression is a equivalent to

x² + 9x - 36

• (x + 12)(x - 3)

• (x + 9)(x - 4)

• (x - 12)(x + 3)

• (x - 9)(x - 4)

Factor

Which expression is equivalent to a² - a - 12

• (a - 4)(a + 3)

• (a + 6)(a - 4)

• (a - 6)(a + 4)

• (a + 4)(a - 3)

Which expression is equivalent to

3a² + 4a + 1

• (7a-10)(a-8)

• none of these

• (3a+1)(a+1)

• (3a-1)(a-1)

Which expression is equivalent to

2n² + 13n + 15

• (5n - 9)(n - 3)

• (3n + 7)(n + 4)

• (2n + 3)(n + 5)

• none of these

Which expression is equivalent to

5x² - 13x + 6

• (x - 3)(5x - 2)

• (5x - 3)(x - 2)

• 5(x - 3)(x + 2)

• none of these

Which expression is equivalent to

3v² - 4v - 7

• (3v-7)(v+1)

• 3(v-7)(v-1)

• (3v+1)(v-9)

• (3v+1)(v-10)

Which expression is equivalent to:

-12b² - 4b + 16

• (-2b + 2)(6b + 8)

• (-6b - 2)(2b - 8)

• (-6b + 8)(2b + 2)

• none of these

Which expression is equivalent to

9x²-6x-8

• (3x+2)(3x-4)

• (3x+2)(3x+4)

• (3x-2)(3x-4)

• (x-1)(9x+8)

Which expression is equivalent to

2x² - 13x - 70

• (2x-7)(x+10)

• (7x+5)(x+2)

• (2x+7)(x-10)

• 2(x+7)(x+10)

Which expression is equivalent to

5x²-28x+32

• (3x-10)(x+6)

• (x-8)(5x-4)

• (5x-8)(x-4)

• (5x-8)(x+7)