2007-04-02 02:33:58 · 9 answers · asked by Lina 1 in Science & Mathematics ➔ Mathematics
(x - 3)² + xy - y³
(7 - 3)² + 7(- 3) - (- 3)³
(4)² + (- 21) - (- 27)
16 - 21 + 27
- 5 + 27
22
- - - - - - - - - s-
2007-04-02 02:49:35 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
(x - 3)^2 + xy - y^3 when x = 7, y = - 3
=(7-3)² + (7) (-3) - (-3)³ :substitute the values
=16+(-21)-(-27)
= -5-(-27)
= 22 :answer
2007-04-02 09:48:17 · answer #2 · answered by edison c d 4 · 0⤊ 0⤋
(x-3)^2 + xy - y^3
(x^2+9-6x) + 7 x -3 - (-3)^3
(49 + 9 - 6 x 7) -21 + 27
(58-42) x 7
16 x 7
=112
2007-04-02 09:44:30 · answer #3 · answered by pokemon maniac 6 · 0⤊ 0⤋
just take it step by step
(x - 3)^2 + (xy) - (y^3)
insert values for x & y
(7-3)^2 + (7*-3) - (-3^3)
do math inside parenthses
4^2 + (-21) - (-27)
adjust plus/minus signs
4^2 - 21 + 27
or
16 - 21 + 27
finish it off
22
2007-04-02 09:47:51 · answer #4 · answered by danchan22 2 · 0⤊ 0⤋
What does the little arrow thing mean? If it means 'to the power of 2' or w/e the answer is:
16 + 21 - 9
37 - 9 = 28
28 is the answer!
Hope this helps x
2007-04-02 09:49:18 · answer #5 · answered by chaseandzoaremeant2be 3 · 0⤊ 0⤋
your expression is equal to 4^2 + (-21) - (-27) when you substitute the values of x and y as you specified. it is then equal to 16 - 21 + 27 = 22.
2007-04-02 09:39:53 · answer #6 · answered by billy_ws 1 · 0⤊ 0⤋
(7-3)^2+(7*-3)-(-3^3)
(4^2)+(-21)-(-27)
16-21+27
22
2007-04-02 09:43:05 · answer #7 · answered by firephotodude 3 · 0⤊ 0⤋
Do it yourself you lazy bastard!
2007-04-02 09:48:11 · answer #8 · answered by Anonymous · 0⤊ 1⤋
22
Please give me best answer thanks!
2007-04-02 10:51:14 · answer #9 · answered by Anonymous · 0⤊ 0⤋