x^2 - 5x
= x(x-5) simple common factor
x^2 - 81
= (x+9)(x-9) very standard difference of squares
Are you just learning to factor?
These are very easy.
Factorise:
a)x squared - 5x
b)x squared - 81
1 answer
a)x squared - 5x
b)x squared - 81
1 answer
2 answers
1 answer
1 answer
1 answer