Question

Find the value of 2x³ – 4x² if x = -3​

Answer 1

Answer:

90

Step-by-step explanation:

$2 { (- 3)}^{3} - 4 {(3)}^{2}$

(2 * -27) - (4*9)

-54-36

-90

Answer 2

Answer:

-90

Step-by-step explanation:

⇒ 2x³- 4x²

⇒ 2× (-3)³- 4× (-3)²

⇒ 2×(-27) - 4×9

⇒ -54 -36

⇒ -90

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