Step-by-step explanation:
II-Factor the common factor out of each expression.
1.-4+16a²
a²-b²=(a+b)(a-b) where a=1 and b=2a
= -4(1+2a)(1-2a)
2 . 10k²-4
= 2(5k²-2)
3.4x²+4x+4
=4(x²+x+1)
4.m²+6m+9
=(m+3)²
=(m+3)(m+3)
5.m³-64
=(m-4)(m²+4m+16)
