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1 vote
If z = 15, what would the expression z2 − 2z + 15 be equal to?

User Amar Kumar
by
7.8k points

2 Answers

5 votes

Expressions

Substitute 15 for z.

z² - 2z + 15

15² - 2 * 15 + 15

225 - 30 + 15

225 - 15

210

The expression is equal to 210.

User Shn
by
7.5k points
1 vote

Answer:


\huge\boxed{\sf 210}

Explanation:

Given expression:

= z² - 2z + 15

Put z = 15

= (15)² - 2(15) + 15

= 225 - 30 + 15

= 195 + 15

= 210

So, substituting z = 15 makes the expression equal 210.


\rule[225]{225}{2}

User Rajat Singhal
by
8.6k points