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Mathematics 10J3 > Functions and Formulae > Flashcards

Flashcards in Functions and Formulae Deck (10)
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1

What is the method for changing the subject of a formula, such as y = 3x + 5?

Write down what has been done to x in order to get y
Undo this in reverse order
Write equal to x

2

What do you need to remember when expanding double brackets?

Use the grid method or 'eyebrows and smiley face'

3

What is an expression?

A collection of algebraic terms separated by + or - such as 3x+5

4

What is an identity?

An equation which works for every value of letter such as 5(x+7) = 5x+35

5

If f(x) = 3x +7, what is f(1)?

f(1) = 3 x 1 + 7 = 10

6

If g(x) = x^2 - 6x, what is g(2)?

g(2) = 2^2 - 6x2 = -8

7

Expand these brackets (x+5)(x+9)

x^2 + 14x + 45

8

Expand these brackets (x+5)(x-9)

x^2 - 4x - 45

9

Expand these brackets (x-5)(x-9)

x^2 - 14x + 45

10

Expand these brackets (x-5)(x+9)

x^2 + 4x - 45