Question

thực hiện phép tính (3x-1)(2x+7)-(12x^3+8x^2-14x):2x mn giúp em với:(((

Answer 1

\(\left(3x-1\right)\left(2x+7\right)-\left(12x^3+8x^2-14x\right):2x\)
\(=6x^2+19x-7-2x\left(6x^2+4x-7\right):2x=6x^2+19x-7-\left(6x^2-4x+7\right)=15x\)

Answer 2

(3x - 1)(2x + 7) - (12x³ + 8x² - 14x) : 2x

= 6x² + 21x - 2x - 7 - (6x² + 4x - 7)

= 6x² + 21x - 2x - 7 - 6x² - 4x + 7

= 6x² - 6x² + 21x - 2x - 4x - 7 + 7

= 5x 

Answer 3

Ta có: \(\left(3x-1\right)\left(2x+7\right)-\left(12x^3+8x^2-14x\right):2x\)

\(=6x^2+21x-2x-7-6x^2-4x+7\)

\(=15x\)