Grade 9_ Midterm_S1_Retest

The factorisation of 4x + 16 is _______

• 4(x + 4)
• 4(x - 4)
• x + 4
• 4x + 4

The greatest common factor of 5a and 15b is _____

• 5
• 3
• 4
• 15

The factorization of (x³ - 25 x) is ______

• x (x - 5)²
• x (x + 5)²
• x (x + 5) (x - 5) 
• None of these

(x + 1) (x + 1) is a factor of ____

• x² + 2x + 1
• x² - 2x + 1
• x² - 1 + 2x
• x² + 1 - 2x

Choose the correct answer:
The factorisation of 25x²y - 5xy is  

• 5xy (5x - 1)
• 5xy (5x + 1)
• 5xy (5x + 5)
• 5xy (x - y)

Choose the correct answer:
The factors of a⁴ - b⁴ is _____

• (a² + b²) (a + b) (a - b)
• (a² + b²) (a² + b²)
• (a² - b²) (a² - b²)
• None of these

3a² - 9ax

• a² (3 - 9x)

• 3a(a -3x)

• 3a(a-9x)

• a(3a-9x)

x² - 25

• (x -5)(x-5)

• (x-25)(x+25)

• (x+5)(x-5)

• (x² +5)(x²-5)

100x² - 121

• (50x +11)(50x-11)

• (10x - 11)(10x-11)

• (10x+11)(10x+11)

• (10x+11)(10x-11)

x² +6x+5

• (x+2)(x+3)

• (x+2)(x-3)

• (x+1)(x+5)

• (x-1)(x-5)