Antonia is factoring the polynomial, which has four terms. 21x^3-63x^2+15x-45,3[7x ^3-21x^2+5x-15], 3[7x^2(x-3)+5(x-3)]21x^2(x-3) b. 36x^2(x-3) c. 3(7x^2+5)(x-3) d. 3(12x^2+5)(x-3)

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

it is 570

step-by-step explanation:

thus, the first answer choice, y = sec x, is the correct one