If [tex]x = 3[/tex] and [tex]y = -1[/tex], then [tex]3x^2 + 2xy - 5 = ?[/tex]

A. 18
B. 24
C. 12
D. 16

x = 3 , y = − 1 3 x 2 + 2 x y − 5 = 3 ⋅ 3 2 + 2 ⋅ 3 ⋅ ( − 1 ) − 5 = = 3 ⋅ 9 − 6 − 5 = 27 − 11 = 16 A n s w er : D : 16

Answered by Lilith | 2024-06-10

3 ⋅ 3 2 + 2 ⋅ 3 ⋅ ( − 1 ) − 5 = 27 − 6 − 5 = 16

Answered by konrad509 | 2024-06-10

After substituting x = 3 and y = − 1 into the expression 3 x 2 + 2 x y − 5 and performing the calculations, we find that the answer is 16 . The correct option is D: 16.
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Answered by Lilith | 2024-09-20