Question

9z3- 27z3- 100 +300​

Answer 1

Answer:

$\boxed{-54z+200}$

Step-by-step explanation:

Multiply from left to right.

$9*3=27$

$27z-27*3z-100+300$

Multiply.

$27*3=81$

$27z-81-100+300$

$27-81=-54z$

Add similar.

$-54z-100+300$

Add and subtract numbers from left to right.

$=-54z+200$, is the correct answer.

Answer 2

Answer:

$9z\cdot \:3-27z\cdot \:3-100+300=-54z+200$

Step-by-step explanation:

$9z\cdot \:3-27z\cdot \:3-100+300$

$\gray{\mathrm{Multiply\:the\:numbers:}\:9\cdot \:3=27}$

$=27z-27\cdot \:3z-100+300$

$\gray{\mathrm{Multiply\:the\:numbers:}\:27\cdot \:3=81}$

$=27z-81z-100+300$

$\gray{\mathrm{Add\:similar\:elements:}\:27z-81z=-54z}$

$=-54z-100+300$

$\gray{\mathrm{Add/Subtract\:the\:numbers:}\:-100+300=200}$

$=-54z+200$