maths anyone please tell .
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Answered by
3
Answer:
question 1 is
13z -10z-7z^3
2) 0
Answered by
1
Answer:
1st answer
-z²+13z²-5z+7z³-15z
7z³+(-z²+13z²)+(-15z-5z)
7z³+(+12z²)+(-20z)
7z³+12z²-20z
Step-by-step explanation:
2nd answer
(a+b)-(a-b)
a+b-a+b
a-a+b+b
0+2b
2b
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