Factorise and solve x^2 + 3x - 4 = 0
To factorise this equation, we must find two numbers that add together to make 3 and multiply to make -4. These numbers must be -3 and -1. We would then rewrite the equation as (x-3)(x-1)=0.
To solve this equation, we need to make either (x-3)=0 or (x-1)=0. This means that there are two solutions to this question.
x-3=0 and x-1=0
This means x=3 or x=1.
DJ
Related Maths GCSE answers
All answers ▸Henry invest £8000 in youtube at a compound interest rate of 2% per year. He wants to earn more than £500 interest. Work out the least time, in whole years, that this would take?
How do I expand single brackets?
A plane flew from Frankfurt to Hong Kong. The flight time was 10hours 45minutes. The average speed was 852km/h. Work out the distance the plane flew.
A bag contains 5 blue marbles and 5 red marbles. If marbles are NOT replaced after being selected from the bag, what is the probability (in percentage) of picking 2 red marbles? Give your answer to one decimal place.