Question

(2x - 1)(4x²+2x+1) -4x(2x²-3)при х=1,5​

Answer 1

Объяснение:

8x³+4x²-4x²-2x+2x-1-8x³+12x=12x-1=12*1,5-1=17

Answer 2

(2x - 1)(4x²+2x+1)-4x(2x²-3)=8х^3-1-8х^3+12х

=-1+12х=-1+18=17

Answer 3

To evaluate the expression (2x - 1)(4x² + 2x + 1) - 4x(2x² - 3) when x = 1.5, you can substitute 1.5 for x and then calculate the result.

(2x - 1)(4x² + 2x + 1) - 4x(2x² - 3) with x = 1.5:

= (2(1.5) - 1)(4(1.5)² + 2(1.5) + 1) - 4(1.5)(2(1.5)² - 3)

Now, calculate each part of the expression:

= (3 - 1)(4(2.25) + 3 + 1) - 4(1.5)(2(2.25) - 3)

= 2(9 + 3 + 1) - 4(1.5)(4.5 - 3)

= 2(13) - 4(1.5)(1.5)

= 26 - 9

= 17

So, when x = 1.5, the expression (2x - 1)(4x² + 2x + 1) - 4x(2x² - 3) equals 17.