ALGEBRAIC EXPRESSION

If C = 216K, find the least integer K that makes C a perfect square.

• 2

• 4

• 6

• 8

• 1/2

• 3/4

• 5/4

• 7/4

 Which of the following is the factorisation of x³ – x?

     

•  x(x – x²)

• x[(1+ x) (1 – x)]

• x(x² – x)

• x[(x + 1) (x – 1)]

Simplify the expression

6m + 10 - 10m

• 4m+10

• −4m+10

• 16m+10

• 6m

If a + b = 5 and ab = 6, find a² + b².

• 13
• 12
• 10
• 11

The square of x² - 2y² is ______

• x⁴ - 4x²y² + 4y⁴
• x⁴ + 4x²y² + 4y⁴
• x⁴ - 4x²y² - 4y⁴
• None of the above

Tags

CCSS.7.EE.A.1

Co-efficient of x² in algebraic expression :-2x²y is : 

• -1
• -2
• -2y
• y

There are m boys and n girls in a parade. Each person carried 2 balloons. Which of the following expression represents the total number of balloons that were carried in the parade?

• 2(m + n)

• 2 + (m + n)

• 2m + n

• m + 2n

Factor the expression: 4x² - 25. What is the factored form?

• (2x + 5)(2x - 5)

• (2x - 5)(2x - 5)

• (4x + 5)(x - 5)

• (2x + 5)(4x - 25)