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Schach [20]
3 years ago
15

Evaluate the following expression

Mathematics
2 answers:
chubhunter [2.5K]3 years ago
8 0

Answer:

2 {x}^{2}  - 5xy -  {y}^{3}  \\ x =  - 3 \\ y =  - 2 \\ 2 { (- 3)}^{2}  - 5  \times  - 3 \times  - 2 -  { (- 2)}^{3}  \\ 2 \times 9  +  - 30  -  - 8 \\  = 18 - 30 + 8 \\  =  - 4 \\ thank \: you

vaieri [72.5K]3 years ago
7 0

H ;-)

x = -3 and y = -2

2x² - 5xy - y³ =

= 2 · (-3)² - 5 · (-3) · (-2) - (-2)³ =

= 2 · 9 - 30 - (-8) = 18 - 30 + 8 =

= -12 + 8 = <u>-4</u>

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