Question

Evaluate the expression for x = 4 and y = 5.


6(x2 - y) - y2

Answer 1

8

Answer 2

41

Answer 3

okay. did you try substituting x as 4 and y as 5 ?
show me the steps you followed

Answer 4

6(4*2-5)-5\[^{?}\]

Answer 5

yay for -6

Answer 6

\[6(4*2-5)-5^{?}\]

Answer 7

okay. i am confused. does y2 mean y squared?

Answer 8

y to the secound power

Answer 9

-7

Answer 10

okay. then why did you do 4*2 for x2 rather than 4^2?

Answer 11

thats what i ment

Answer 12

so if i understand you correctly,
\[6(4^2 -5)-5^2\]

Answer 13

yes

Answer 14

okay. what is 4 squared?

Answer 15

um. what is 4 raised to the power 2?
what do i mean when I say 7 squared is 49?

Answer 16

so 4 squared is 16 right?

Answer 17

yes. good. the square of a number x is x^2. that means it is x times x.

Answer 18

so 4^2 is 16
what is 5^2?

Answer 19

25

Answer 20

is the answer to the whole Q 8?

Answer 21

no. evaluate the thing inside the brackets first.
then multiply that by 6. finally subtract 25 from that

Answer 22

so 6(16-5)-25
6*11-25
66-25
41

Answer 23

yes. very good.