Question

repede am nevoie urgent!!!!
dau coroana​

Answer 1

Răspuns:

2.

$4 \sqrt{2} + 9 \sqrt{2} - 13 \sqrt{2} = 0$

$2 + \sqrt{6} - 6 - \sqrt{6} = - 4$

3.

${x}^{2} - 7x + 5 - {x}^{2} - 7x + 8 = 13 - 14x$

$4 {x}^{2} + 4x + 1 - 4 {x}^{2} + 4x - 1 = 8x$

4.

a)

$x(x + 1) - (x + 1) = (x + 1)(x - 1)$

b)

$(x + 3)^{2} - {y}^{2} = (x + 3 - y)(x + 3 + y)$