Quadratic Equations

## Equations

Quadratic equations can be written in the form ax^2 + bx + c = 0 where a,b and c are numbers

You need to be able to solve a quadratic equation without using your calculator

Rearrange it into the form ax^2 + bx + c = 0

Factorise the left-hand side

Set each factor equal to zero and solve to find two values of x

## Worked it out

Follow the three steps given above

The equation is already in the right form sometimes

To factorise look for two numbers which add up to the 2nd number and multiply to make the 3rd number

Set each factor equal to 0 and solve

When you are solving a quadratic equation you must rearrange it into the form

Be really careful if the coefficient of x^2 is bigger than 1

When you are solving an equation`you must always show clear algebraic working

Don’t just write down the answers without any working

# Quadratic Equations

## Equations

Quadratic equations can be written in the form ax^2 + bx + c = 0 where a,b and c are numbers

You need to be able to solve a quadratic equation without using your calculator

Rearrange it into the form ax^2 + bx + c = 0

Factorise the left-hand side

Set each factor equal to zero and solve to find two values of x

## Worked it out

Follow the three steps given above

The equation is already in the right form sometimes

To factorise look for two numbers which add up to the 2nd number and multiply to make the 3rd number

Set each factor equal to 0 and solve

When you are solving a quadratic equation you must rearrange it into the form

Be really careful if the coefficient of x^2 is bigger than 1

When you are solving an equation`you must always show clear algebraic working

Don’t just write down the answers without any working