Question

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

Answer 1

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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`

Answer 2

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!