9.) What is the range of the function f(x) = -2x - 4 when the domain is 1-5) 5. -1, 2)? A) R:(2.0.-2) B) R:(2,-4,-2) C) R:(-2, 0,-1) D) R:{6, -2,-8)

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb