Question

Evalute 2n2 − 7n − 4 given n(n − 2) = 15.
(smaller value)
(larger value)

Answer 1

Evaluate
\[2n^2 - 7n - 4\]

given
\[n^2 - 2n -15 = 0\]

Answer 2

n^2 - 2n - 15

= (n-5) (n +3) = 0

n = 5, -3

Answer 3

substite the values of n to the evaluate equation

Answer 4

n^2 -2n = 15
n^2-2n-15=0

used factorisation
(n-5)(n+3)=0
n=5, n=-3

and then substitute into the other equation both answers.

Answer 5

i did this one earlier on
answers 11 and 35 if my memory serves me right

Answer 6

Yes, 11 and 35 are the right answers after all those steps have been done.