Question

add th he following expression:

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Answer 1

Answer:

$2z^{4} + -z^{2} + -3$

Step-by-step explanation:

- First we order the equation into brackets with same variables

- Then add it

(4z^{4} + - 2z^{4}) + (-7z^{3} + 4z^{3} + 3z^{3}) + (2z + -z + -z) + (-5z^{2} + 3z^{2} + z^{2}) + (3 + -5 + -1)  

= 2z^{4} + -z^{2} + -3

Answer 2

Answer:

the atom is defined as the smallest particle of an element which retains its chemical definitely in physical and chemical change s

Step-by-step explanation:

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