Me with number 5 ! people say it’s simple but it’s not : (

D  7(x^2-2y) (x^2+2y)

Step-by-step explanation:

7x^4 -28y^2

Factor out  7

7(x^4-4y^2)

This is the difference of squares

a^2 – b^2 = (a + b)(a – b)

let a^2 = x^2   so a=x^2

let b^2 = 4y^2   so b = 2y

7(x^4-4y^2) = 7(x^2-2y) (x^2+2y)

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )