Find the solutions to the quadratic equation x^2-9x+20=0
By factorising the expression, (x-5)(x-4)=0. This means that either (x-5)=0 or (x-4)=0. By solving these equations we can work out the solutions to be x=4,5.
CM
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All answers ▸Alex designs a game for people to play, using two fair five-sided spinners. A person wins the game when both spinners land on the same letter. People pay 40p for each game they play. The prize for a win in £1. Is she likely to raise money?
Solve the simultaneous equations 2x + y = 7 and 3x - y = 8.
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What is the correct answer if you rearrange the following, making "c" the subject? (3c+b)/2 = c + a