class 8 maths

The factorization of (x³ - 25 x) is ______

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

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

• 5
• 3
• 4
• 15

Choose the correct answer:
a² + bc + ab + ac = ______

• (a + b) (a + c)
• (a + b) (b + c)
• (a + c) (b + c)
• a (a + b + c)

Tags

CCSS.HSA.APR.A.1

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

Factorise l'expression suivante : $x^4-81=$  

•  $\left(x²-9\right)\left(x²+9\right)$  

•  $\left(x-3\right)\left(x+3\right)\left(x²+9\right)$  

•  $\left(x+3\right)\left(x+3\right)\left(x²+9\right)$  

•  $\left(x+3\right)\left(x+3\right)\left(x²-9\right)$  

x² + 8x + 16

• (x + 2)(x + 8)

• (x + 4)(x + 4)

• (x + 2)(x + 6)

• (x + 2)(x + 4)

16x² - 8x + 1

• (4x - 1)(4x + 1)

• (4x - 1)(4x - 1)

• (4x + 1)(4x + 1)

• 4x² - 1

(4a⁰b²c⁴)²

• b⁴c⁸

• 4b⁴c⁸

• 8b⁴c⁸

• 16b⁴c⁸

• 16a²b⁴c⁸

Tags

CCSS.6.EE.A.1

The length of a rectangle is 4a⁴b⁵ and the width is 3a²b³, what is the expression that represents the area of the rectangle?

Area = length ⋅ width

• 12a⁶b⁸
• 7a⁶b⁸
• 12a⁸b¹⁵
• 12a²b²

Tags

CCSS.HSA.APR.A.1

Express the number appearing the following statement in standard form:
'The diameter of the sun is 1,400,000,000 m

• 1.4 × 10⁹
• 1.4 × 10¹⁰
• 14 × 10⁹
• 14 × 10¹⁰