Question

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

Answer 1

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Let's evaluate :

• ${2x}^{3} + 5x {}^{2} - 10$

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

• $(2 \times - 8) + (5 \times 4) - 10$

• $- 16 + 20 - 10$

• $- 26 + 20$

• $- 6$

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!