Question

If x = -2, find the value of 3x^3 - 5x^2 + 4

Answer 1

Given

• x = -2

To find

• 3x³ - 5x² + 4

Solution

• 3x³ - 5x² + 4
• 3(-2)³ - 5(-2)² + 4
• 3(-8) - 5(4) + 4
• -24 - 20 + 4
• -44 + 4
• -40

∴ If x is -2 , then 3x³ - 5x² + 4 is -40

Answer 2

Answer:

Given,

3x³ - 5x² + 4

Find,

the value

Step-by-step explanation:

So,

Substituting x = -2 in the given expression

We get,

3x³-5x²+4

=> 3 * (-2)³ - 5 * (-2)² + 4

=> 3 * (-2) * (-2) * (-2) - 5 * (-2) * (-2) + 4

=> -24 -20 + 4

=> -44 + 4

=> -40

Hence,

the value is -40