Prove that the square of an odd number is always 1 more than a multiple of 4
(2n+1)2 = (2n+1)(2n+1)
Use FOIL method= 4n2+2n+2n+1= 4n2+4n+1= 4(4n+n)+1
4n+n is just a number, therefore proved
DH
Related Maths GCSE answers
All answers ▸The point P has coordinates (4, 5). The point Q has coordinates (a, b). A line perpendicular to PQ is given by the equation 5x+3y=11. Find an expression for b in terms of a.
Solve the simultaneous equations: 5x + y = 21, x - 3y = 9
How do I differentiate?
x/x-1 - x/x+1 simplify