Question

By how much does the expression 72z²- 45z + 4 exceed the expression 30z - 42z² - 17? answer fast and then I will follow you.

Answer 1

Answer: The expression 72z²- 45z + 4 exceed the expression 30z - 42z² - 17 by 114z²-75z+21

Step-by-step explanation:

we have to find that how much does the expression 72z²- 45z + 4 exceed the expression 30z - 42z² - 17

Expression 1 : 72z²- 45z + 4

Expression 2: 30z - 42z² - 17

Expression 1 - Expression 2

$(72z^2- 45z + 4)-(30z - 42z^2 - 17)\\\\=72z^2- 45z + 4-30z+42z^2+17\\\\=72z^2+42z^2-45z-30z+4+17\\\\= 114z^2-75z+21$

Hence,the expression 72z²- 45z + 4 exceed the expression 30z - 42z² - 17 by 114z²-75z+21

Answer 2

Step-by-step explanation:

we have to find that how much does the expression 72z²- 45z + 4 exceed the expression 30z - 42z² - 17

Expression 1 : 72z²- 45z + 4

Expression 2: 30z - 42z² - 17

Expression 1 - Expression 2

\begin{gathered}(72z^2- 45z + 4)-(30z - 42z^2 - 17)\\\\=72z^2- 45z + 4-30z+42z^2+17\\\\=72z^2+42z^2-45z-30z+4+17\\\\= 114z^2-75z+21\end{gathered}

(72z

2

−45z+4)−(30z−42z

2

−17)

=72z

2

−45z+4−30z+42z

2

+17

=72z

2

+42z

2

−45z−30z+4+17

=114z

2

−75z+21

Hence,the expression 72z²- 45z + 4 exceed the expression 30z - 42z² - 17 by 114z²-75z+21