Help pls (: A house must be painted. Susan can paint the house in t hours. If Robert paints the house, it will take 3 hours longer than Susan. If Susan and Robert work together, they can paint the house in 12 hours. How long would it take for Susan to paint the house individually? How long would it take for Robert to paint the house individually?

goog may have it for you

step-by-step explanation:

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