Question

a) (x - 3)(2x ^ 2 - 3x + 4)

b) (4x ^ 2 * y - 5x * y ^ 2 + 6xy) 2xy:

c  ) x/(2x + 4) - 2/(x ^ 3 + 2x)

Ai giúp mik vs ạ🥲

Answer 1

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Answer 2

a: \(\left(x-3\right)\left(2x^2-3x+4\right)\)

\(=2x^3-3x^2+4x-6x^2+9x-12\)

\(=2x^3-9x^2+13x-12\)

b: \(\left(4x^2y-5xy^2+6xy\right):2xy\)

\(=\dfrac{4x^2y-5xy^2+6xy}{2xy}\)

\(=\dfrac{2xy\cdot2x-2xy\cdot2,5y+2xy\cdot3}{2xy}\)

\(=2x-2,5y+3\)

c: \(\dfrac{x}{2x+4}-\dfrac{2}{x^3+2x}\)

\(=\dfrac{x\left(x^3+2x\right)-2\left(2x+4\right)}{x\left(x^2+2\right)\cdot2\cdot\left(x+2\right)}\)

\(=\dfrac{x^4+2x^2-4x-8}{2x\left(x^2+2\right)\left(x+2\right)}\)