Answer:
Step-by-step explanation:
45x = 9*5*x
81 = 9*9
GCF = 9
Take 9 out using distributive property { a*b - c*b = b*(a-b)}
45x - 81 = 9*5x - 9*9
= 9*(5x - 9)
=9(5x-9)
a. the sign is interchange
it should be = x^2 - 3x + 4 - x^3 - 7x + 2
60 cm(i think)
12÷4=3
180÷3=60
60 cm
=−x5+5x4+125x2−625x
