How do you figure mental math 46+14=

60

Step-by-step explanation:

One way of doing this addition mentally would be to round up 46 to 50 and round down 14 to 10.  Adding 50 and 10, we get 60, which is in this case the correct sum.

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