# Unit 9 9.4 to 9.7

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Slide 1: Slide
MathematicsSecondary Education

This lesson contains 18 slides, with interactive quizzes and text slides.

## Items in this lesson

#### Slide 2 -Slide

Use the formula v = u + at to work out the value of v when u = 7, a = 10, t = 8

#### Slide 3 -Open question

a. Write the formula of number of seconds, S, in any number of minutes, M.
b. Use the formula in part a to work out S when M = 15.
c. rearrange your formula in part a to make M the subject.

#### Slide 5 -Slide

Factorise each of these expressions.
1) 18y - 9x
2)
3)
3x2+x
3y29y+6xy

#### Slide 6 -Open question

Factorise each of these expressions.
1) 14 + 21c
2) 15z +10yz
3) 2x + 6y + 8

Simplify
5x+5x

Simplify
52y+103y

Simplify
94a53b

#### Slide 13 -Slide

Expand and simplify
1. (x+3)(x+7)
2. (y-4)(y+8)

#### Slide 14 -Open question

Expand and simplify
1. (x-3)(x-7)
2. (y+4)(y-8)

#### Slide 15 -Open question

Expand and simplify

(y+5)2

#### Slide 16 -Open question

Expand and simplify

(n9)2

#### Slide 17 -Open question

Expand and simplify
1.
2. (p+10)(p+10)
(p+10)2