Which of the following functions is graphed below? y= {x^2 + 3, x _> 4
x + 4, x < 4}

y= {x^2 + 3, x > 4
x + 4, x _< 4}

y= {x^2 + 3, x < 4
x + 4, x _> 4}

y= {x^4 + 3, x _< 4
x + 4, x > 4}

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

ιт ιѕ (9χ^5+10)(81χ^10-90χ^5+100)

step-by-step explanation:

нσρє ι ¢συℓ∂ нєℓρ уσυ συт тσ∂α