Factor –7x3 + 21x2 + 3x – 9 by grouping. what is the resulting expression?
(3 – 7x)(x2 – 3)

(7x – 3)(3 + x2)

(3 – 7x2)(x – 3)

(7x2 – 3)(3 + x)

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?