Solve x^2 + 10x - 3 = 0
completing the square (x+5)2 -25 -3 =0 (x+5)2 -28 = 0 (x+5)2 = 28 x= ±2√7 -5
IH
Related Maths GCSE answers
All answers ▸What is the length of x?
We have 2 spinners: spinner A and spinner B. Spinner A can land on 2, 3, 5 or 7. Spinner B can land on 2, 3, 4, 5 or 6. Spin both. Win if one spinner lands on odd and the other lands on even. Play game twice, what is the probability of winning both games?
5x-7 = 3x + 3, solve x
solve the simultaneous equation: 3x+y=7, 2x+4y=8