Question

dau coronita la exercițiul 5 ​

Answer 1

a)

$= {2x}^{2} + x - 2x - 1 = x \times (2x + 1) - (2x + 1) = (2x + 1)(x - 1)$

b)

$= {3x}^{2} + 3x - 2x - 2 = 3x \times (x + 1) - 2(x + 1) = (x + 1)(3x - 2)$

d)

$= {2x}^{2} + 2x + x + 1 = 2x \times (x + 1) + x + 1 = (x + 1)(2x + 1)$

e)

$= {2x}^{2} + 2x - 3x - 3 = 2x \times (x + 1) - 3(x + 1) = (x + 1)(2x - 3)$

g)

$= {2x}^{2} + x - 4x - 2 = x(2x + 1) - 2(2x + 1) = (2x + 1)(x - 2)$

h)

$= {14x}^{3} - 4 = 2( {7x}^{3 } - 2)$