Solve y = x^2 + 3x + 2 = 0
Factorising gives: y = (x+2)(x+1) = 0. y only equals 0 when (x+2)=0 or (x+1)=0. Therefore x=-2 or x=-1
SL
Related Maths GCSE answers
All answers ▸For what values of x is 2x^2 - 11x - 6 > 0 ?
Simplify Fully: (b^6 x b^2) / b^4
Adam buys 4kg of sweets and pays £10 for them. Adam puts all of the sweers into bags with 250g in each bag. He sells the bags for 70p each. All the bags of sweets are sold, what is the percentage profit?
What is a box-plot diagram?