Why do square roots have more than 1 solution?
As 3 2 is equivalent to (-3)2 it follows that the square root of 9 must be + or -3.
MH
Related Maths GCSE answers
All answers ▸Solve the following pair of simultaneous equations: 1. 3x + 2y = 9 2. 6x + 5y = 21
Solve the following simultaneous equations: 3x + 2y = 16 2x + 3y = 14
Solve (x + 2)(x+3) = (2x+4)
Each day Chen buys pasta or a sandwich. Where Pasta costs £3.20 and Sandwich costs £2.75. For 45 days, the relative frequency of Chen buying a sandwich was one fifth. Altogether, how much did he pay?