Question

if 3x - 2y = 13 and xy = 5 then find the value of 27x(raise to 3) - 8y(raise to 3) {in the last part only x and y are raised to the power of three} ANSWER THIS QUESTION ASAP AND GET PROMISED BRAINLIEST AND POINTS. PLS ANSWER FAST

Answer 1

HELLO DEAR,

GIVEN THAT:-

xy = 5

3x - 2y = 13

(3x - 2y)³ = 13³

⇒[ 27x³ - 8y³ - 3(3x * 2y)(3x - 2y) = 2197

⇒(27x³ - 8y³) = 2197 + 12(5)(13)
∴ [ xy = 5 , (3x - 2y) = 13 ]

⇒(27x³ - 8y³) = 2197 + 60 * 13

⇒(27x³ - 8y³) = 2977

I HOPE ITS HELP YOU DEAR,
THANKS

Answer 2

the answer is.......

m=-7 ,n=4;70