if x = 3 and y = 2, then the value of ( x – y )(x² + xy + y²) is (a) 31 (b) 19 (c) 1 (d) 25 ​

Question

if x = 3 and y = 2, then the value of ( x – y )(x² + xy + y²) is
(a) 31 (b) 19 (c) 1 (d) 25 ​

in progress 0
Vân Khánh 6 months 2021-07-29T20:41:24+00:00 2 Answers 4 views 0

Answers ( )

    0
    2021-07-29T20:42:53+00:00

    \displaystyle\bf \underbrace{ (x-y)(x^2+xy+y^2)}}_{x^3-y^3}=3^3-2^3=19\\\\Answer: b)19

    0
    2021-07-29T20:43:02+00:00

    Answer:

    19

    Step-by-step explanation:

    (3-2)(3^2+3×2+2^2)

    (1)(9+6+4)

    (1)(19)

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )