Question

Reduceți termenii asemenea
$7x + 2y - 4z - 5x + 6y + 3z$
$3a - 9b + 2a + 7b - 4a - 5b$
$8x - 3y - 5z - 9x - 4y + 3z$
$13x ^{2} - 2x + 4x ^{2} - 11x - 15x ^{2} + 13x$
$17xy - 21 {x}^{2}y - 12xy + 23 {x}^{2} y - 2 {x}^{2}y$
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Answer 1

a)

2x + 2y - 4z + 6y + 3z

2x + 8y - 4z + 3z

2x + 8y - z

b)

a - 9b + 7b - 5b

a - 7b

c)

-x - 3y - 5z - 4y + 3z

-x - 7y - 5z + 3z

-x - 7y - 2z

d)

2x la a 2 a - 2x - 11x + 13x

2x la a 2 a + 0

2x la a 2 a

e)

5xy - 21x la a 2 a y + 23x la a 2 a y - 2x la a 2 a y

5xy + 0

5xy