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3 votes
2x^2 + 3x - 12 when x = 5 help pls

User Coree
by
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2 Answers

6 votes
2x^2 + 3(5)-12
2x^2+ 15+-12

combine like terms

2x^2+15+-12
(2x^2)+(15+-12)

Answer:
2x^2 + 3
User Michael Navara
by
3.2k points
5 votes


\huge\textsf{Hey there!}


\mathsf{2x^2 + 3x - 12}


\mathsf{= 2(5)^2 + 3(5) - 12}


\mathsf{5^2}


\mathsf{= 5 * 5}


\mathsf{\bf = 25}


\mathsf{2(25) + 3(5) - 12}


\mathsf{2(25)}


\mathsf{= \bf 50}


\mathsf{3(5)}


\mathsf{= \bf 15}


\mathsf{= 50 + 15 - 12}


\mathsf{50 + 15}


\mathsf{= \bf 65}

65 - 12


\mathsf{= \bf 53}


\boxed{\boxed{\huge\textsf{Answer: \bf 53}}}\huge\checkmark


\large\textsf{Good luck on your assignment and enjoy your day!}

~
\frak{Amphitrite1040:)}

User Aaronstacy
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3.6k points