Question

plz plz plz help me​

Answer 1

Step-by-step explanation:

25)

(x³ - 2y³+2y³-3z²+3z³-x³)

now cut the same the value the answer is 1

26) i don't know what is written between y and x

Answer 2

Answer:

I know(26).

$2x +y = 3 \: \: \: \: \: \: \: \: (1)\\ x - 2y = 4 \: \: \: \: \: \: \: (2) \\ using \: substitution \: method \\ x = 4 + 2y \: \: \: \: \: (from \: (2)) \: \: \: \: (3) \\ substituting \: (3) \: in \: (1) \\ 2(4 + 2y) + y = 3 \\ 8 + 4y + y = 3 \\ 5y = - 5 \\ y = - 1 \\ then \: x \: will \: be \: \\ x - 2( - 1) = 4 \\ x + 2 = 4 \\ x = 2$