Add and Subtract Like Terms
Simplify the following expression:
a + a + b2a + b
Simplify the following expression:
7 x e + 2 x g
Hint: __e + __g
7e + 2g
Expand the following expression:
3(4x + 1)
Hint: __x + __
12x + 3
Factorise the following expression:
2x + 4
hint: 2(__ + __)
2(x + 2)
Factorise the following expression:
x2 + 9x + 20
hint: (x + _)(x + 5)
(x + 4)(x + 5)
Simplify the following expression:
7dm + 7md + 3d - d
14dm + 2d
or
14md + 2d
Simplify the following expression:
-5p x 2q x 7r
-70pqr
Expand the following expression:
-6x(2x + 4)
-12x2 - 24x
Factorise the following expression:
7xy - 3x
x(7y - 3)
Factorise the following expression:
(x + 6)(x - 3)
x2 + 3x - 18
Simplify the following expression:
5gmz + 3mzg + gm - 2z
18gmz + gm - 2z
Simplify the following expression:
7x2 / 28x
x / 4
Expand the following expression:
4x(2x2 + 3)
8x3 + 12x
Is the statement below correct?
6xyz + 14xy = 2xy(3z+7)
Yes, it is correct
Factorise the following expression:
x2 - 4x - 21
(x - 7)(x + 3)
Simplify the following expression:
2x2y - 3xy2 + x2y + 2xy2
3x2y - xy2
Simplify the following expression:
(12py + 12 x yp) / (7p2 + 5p2)
2y / p
Expand the following expression:
4x(2x2 + 3) + 3x
8x3 + 15x
Complete the factorised expression:
y2 - 5xy5 = __2(1 - 5xy3)
y
y2(1-5xy3)
Factorise the following expression:
x2 - 10x + 25
Double points if written in its simplest form
(x - 5)(x - 5) = (x - 5)2
Solve the following riddle: I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?
Answer: Check the Whiteboard
Clues: Check the Whiteboard
An Echo
Two friends, Gabriel and Bathsheba, are comparing the area of their bedrooms.
Gabriel's bedroom is a rectangle a metres long and b metres wide.
Bathsheba's bedroom is a rectangle b2 metres long and (a / b) metres wide.
Gabriel claims that the two bedrooms have exactly the same area. Explain whether this claim is correct.
The areas of both bedrooms are the same size (Gabriel is correct)
Expand the following expression:
(x + 2)(x + 3)
x2 + 5x + 6
In a class room, four groups were set a task to factorise this expression:
6a2c + 15a5
Each group came up with a different factorised expression. Which group was correct?
1. 3a2(2c+5a2)
2. 3a2(-2ac-5a3)
3. 3a2(6a3 - 2c)
4.3a2(2c + 5a3)
Group 4
3a2(2c + 5a3)
Factorise the following expression:
x2 - 81
(x + 9)(x - 9)