Quadratic Expressions Math Grade 8

Expand and simplify  $2(5x^2−xy+y^2)−3(2x^2+xy−3y^2)$  
 

•  $16x^2-xy-y^2$   

•  $16x^2-xy-11y^2$  
  

•   $4x^2-5xy+11y^2$  

•  $4x^2-5xy+7y^2$   

Expand the following expression

(3p-2) (p+5)

• $3p^2-17p-10$

• $3p^2+17p-10$

• $3p^2+13p-10$

• $3p^2-11p-10$

• (6p-3) (p-5)

• (6p-5) (p-3)

• (3p-5) (2p-3)

• (2p-5) (3p-3)

 Factorize $4x^2-11x+6$ 
*Do not use any space in your answer

An area of a square is represented by the expression $(y^2−6y+9)$  
The length of its side in term of y is ...

• (y+9)

• (y+3)

• (y-3)

• (y-6)

The length of the parallel sides of trapezium are (x+1) cm and (x+7) cm . Given the height of the trapezium is (x+2) cm, find the area of the trapezium.

*Use ^ to express power or exponent, do not use any space in your answer.

The length and the breadth of a rectangle are (2x-4) cm and (x-3) cm respectively.

What is the area of the rectangle in term of x.

*Use ^ to express power or exponent, do not use any space in your answer.

The length and the breadth of a rectangle are (2x-4) cm and (x-3) cm respectively.

Find its perimeter in term of x.

*Use ^ to express power or exponent, do not use any space in your answer. Do not factorize the answer.

Factorize  $0.1y^2+1.2y+2$  

• 1/10(y-2)(y-10)

• (y+2)(y+10)

• 1/10(y+2)(y+10)

• 10(y+2)(y+10)

Simplify the following expression  $3\left(x^2-xy+y^2\right)\ -\ 4\left(\frac{1}{2}x^2-xy+\frac{1}{4}y^2\right)$  

 

•   $x^2\ +xy+2y^2$  

•  $x^2\ -xy+2y^2$   

•   $x^2\ -7xy+4y^2$  

•   $x^2\ +xy+4y^2$