Algebraic Manipulation

What is the value of  $xy-2z$  , when  $x=-2,\ y=4\ and\ z=-5$  

• 2

• 28

• 18

• -18

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

Tags

CCSS.7.EE.A.1

Expand and Simplify
-4(2h + 3)

• -8h - 12
• -8h - 3
• -8h + 3
• -8h +12

Tags

CCSS.6.EE.A.2

CCSS.6.EE.A.3

CCSS.6.EE.B.6

Expand and simplify  $3\left(2a+5\right)-5\left(a-2\right)$  

•  $a+25$  

•  $6a+15$  

•  $11a-5$  

•  $6a+15+5a-10$  

Expand and simplify $\left(x+4\right)^2$  

• x² + 16

• x² + 4x + 4x + 16

• x² + 8x + 16

• x² + 4x

Which of the following is the same as $\left(x-2y\right)^2$  ? Pick all relevant options.

•  $\left(2y-x\right)^2$  

•  $x^2-4y^2$  

•  $x^2-4xy+4y^2$  

•  $\left(x-2y\right)\left(x+2y\right)$  

In this expression, $2x+6y-10$ , which are the coefficients?

• 2, 6, and -10

• x and y

• 2 and 6

• -10

Factorise fully

 $2a\ +\ 4$  

•  $2\left(a\ +\ 4\right)$  

•  $2a\left(1\ +2\right)$  

•  $a\left(2\ +4\right)$  

•  $2\left(a+\ 2\right)$  

Factorise $y^2+7y-30$ 

•  $\left(y-6\right)\left(y+5\right)$  

•  $\left(y-3\right)\left(y+10\right)$  

•  $\left(y+3\right)\left(y-10\right)$ 

•  $\left(y-2\right)\left(y+15\right)$  
  

Factorise the following: $2x^2-13x-70$  

•  $\left(2x-7\right)\left(x+10\right)$ 

•  $\left(7x+5\right)\left(x+2\right)$ 

•  $\left(2x+7\right)\left(x-10\right)$ 

•  $2\left(x+7\right)\left(x+10\right)$