Simplify the expression below:
a2-9a-3
=a2-9a-3
=a-3a+3a-3
=(a−3)·(a+3)(a−3)
=a+3
Difference of two squares
a2-b2=(a-b)·a+b
Simplifying Fractions
P·MQ·M=PQ
a2-9a-3=a+3