Class 8th Algebraic expression and Identities

Which of the following is the numeral coefficient of – 3x²y²?

• 4

• 3

• 2

• -3

What kind of polynomial is -5abc?

• Monomial

• Binomial

• Trinomial

• None of these

The value ofx² – 2yx + y² when x= 1; y = 2 is

• 1

• 2

• 4

• 5

How many terms are there in the expression 7 – 3x²y?

• 1

• 3

• 2

• 4

Which of the following is a binomial?

• 3xy

• 4x+5y-7x

• 6x+5y-9

• 3x-7+y

The sum of -7x, 3x and 11x

• -7x

• 21x

• 7x

• -21x

What do you get when you subtract. -3xy from 5xy?

• 3xy

• 5xy

• 9xy

• 8xy

The area of a rectangle with length 2l²m and breadth 3lm² is

• (a) l³m³

• (b) 2l³m³

• (c) 4l³m³

• (d) 6l³m³

The value of (x + y) (x + y) + (y – z) (y + z) + (z – x) (z + x) is equal to

• (a) 3x²

• (b) 3y²

• (c) 3z²

• (d) 0

The product of (4x + y) (4x – y) is

• 16x² – 5y²

• 16x² + y²

• 16x² – y²

• 16x² – 4y²