Question

Please Help!
evaluate the polynomial for x=5 and x=-5
3x^2-4x+7

Answer 1

Rewrite your expression. Everytime you start to feel like you want to write an 'x', write '5', instead.

Answer 2

would it make it 15^2-20+7?

Answer 3

Pretty close, but remember to observe your Order of Operations.

\(3\cdot5^{2} = 3\cdot (5^{2}) = 3\cdot 25 = 75\)

Exponents go before multiplication.

Answer 4

oh ok I thought it would be on the outside of ()

Answer 5

thank you for 5=62 and for -5=102

Answer 6

Well, please never write "5 = 62" again. What you mean is, the expression, when evaluated with x = 5, is 62. You do NOT mean what you have written, 5 = 62.

Answer 7

y just exhausted from all this math its never been easy for me i struggle badly