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i) We must differentiate the equation and set it equal to 0 to find stationery points: dy/dx = 3x2 + 6x + 24=0 Note we can take out a factor of 3 x2+ 2x - 8=0 Fact...
x = -4/5 or 2y = 22/5 or -4
When factorising an expression, you first want to find the highest common factor in each term of the expression. Here, our terms are 20 and 5. The highest common factor here is 5, so we want to take 5 out...
When factorizing a quadratic equation you need to try and find 2 numbers that add up to give the 2nd term and times together to give the 3rd term. We can find these 2 numbers by looking at the factors of ...
x=-4, x=2When you see a quadratic equation like this, the first thing you should try and do is factorise it. You need to find two numbers that add together to make the second term of the equation - in thi...
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