Why is there more than one solution to x^2 = 4?
Think about it as 'What numbers can be x to get 4'. Remember that when you square a number the answer is always positive? Here is a situation in which it's important to consider both of the possible solutions.For this question x = 2 or x=-2.This is because when you square both sides they both become positive which makes them both solutions to to this problem.
BT
Related Maths A Level answers
All answers ▸A school has 1200 pupils. 575 of these pupils are girls. 2/5 of the girls like sports. 3/5 of the boys like sport. Work out the total number of pupils in the school who like sport.
How do you prove by contradiction the irrationality of surds. Use sqrt 2 as an example.
Find the derivative of the following function: f(x) = x(x^3 + 2x)
Solve for x: logx(25) = log5(x)