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2x^3+5x^2-10 if x=-2

2 Answers

5 votes


▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Let's evaluate :


  • {2x}^(3) + 5x {}^(2) - 10


  • 2( - 2) {}^( 3) + 5( - 2) {}^(2) - 10


  • (2 * - 8) + (5 * 4) - 10


  • - 16 + 20 - 10


  • - 26 + 20


  • - 6

User Nomann
by
8.3k points
4 votes

Hey there!

2x³ + 5x² - 10

It's given that the value of x is -2. So substitute it in the place of x in the equation.

2(-2)³ + 5(-2)² - 10

= 2 × -8 + 5 × 4 - 10

= -16 + 20 - 10

= 4 - 10

= - 6

Hope it helps ya!

User Wildan Muhlis
by
7.8k points

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