Question

If f(x) = 2x2 − 10, find f(5).

Answer 1

soo .... what is 5^2?

Answer 2

5^2 is 5 times 2 right? If so, than 10.

Answer 3

5^2 is an exponent; if means 5x5

Answer 4

oh okay so 25.

Answer 5

good, now 25 times 2 is?

Answer 6

50

Answer 7

and the last step is to subtract off the 10

50-10 is?

Answer 8

40!

Answer 9

correct

therefore: \(f(5)=2(5)^2-10=40\)

Answer 10

Thank you! And hoe did you know how to multiply 5x5 first?

Answer 11

oh okay nevermind i got it thak you again

Answer 12

how* thank*

Answer 13

its refered to as the order of operations, something that they teach you at the very start of mathing

Answer 14

good luck ;)

Answer 15

Oh don't worry I already know of that ;)