Unit 9 - Quadratics

Question 1

What are the three ways of solving a quadratic equation?

Answer 1

Factorising
Completing the square
The formula

Question 2

How many outcomes does a quadratic equation have?

Answer 2

2

Question 3

What is he format of a quadratic equation?

Answer 3

Ax2 +- bx +- c = 0

Question 4

What do you do first on a quadratic equation?

Answer 4

MAKE IS EQUAL TO 0

Question 5

What do you need to find in a quadratic equation?

Answer 5

Numbers that add o one thing, and multiply to another.

Question 6

What is a difference question?

Answer 6

+ -
OR
- -

Question 7

When do you use the formula?

Answer 7

When the answers AREN’T whole numbers.

Question 8

What is the quadratic formula?

Answer 8

-b +- square root of b2 - (4xaxc) all over 2a

Question 9

What do you do first when using the formula?

Answer 9

Write out what A, B and C are.

Question 10

What is the format for completing the square?

Answer 10

( x + b/2) 2

Question 11

What is the second step for completing the square?

Answer 11

Expand it, and write the difference of c at the end.

Question 12

What is different about simultaneous equations?

Answer 12

There are TWO unknowns

And there are TWO equations.

Question 13

What is the easiest method of solving simulations equations?

Answer 13

Adding and subtracting.

Question 14

What is the harder method for simultaneous equations?

Answer 14

Substitution.

Question 15

What to inequalities have?

Answer 15

A symbol INSTEAD of an equals sign.

Question 16

What does this sign mean:

Answer 16

MORE THAN

Question 17

What does this sign mean:

>

Answer 17

LESS THAN

Question 18

What can you show inequities on?

Answer 18

A number line

Question 19

What does a full fit on a number line mean?

Answer 19

That OR EQUAL to.

Question 20

What does an empty dot on a number line mean?

Answer 20

Not equal to.

No including the number.

Question 21

What happens when an inequality has a upper and lower limit?

Answer 21

Solve them SEPARATELY.

Question 22

What do you do to solve an inequality?

Answer 22

Move all the numbers to the higher numbers side, and the letters on the other.

Question 23

What happens when you multiply or divide by a negative number in an inequality?

Answer 23

YOU FLIP THE INEQUALITY SIGN.

Question 24

What do you do during substitution of simultaneous equations?

Answer 24

Rearrange one of the equations to EQUAL something.
SUBSTITUTE THE OTHER IN.
SOLVE.