Question

A quadratic patteen haa a second term equal to 1 at third term equal,to -6 and a fifth term,equal to -14

Answer 1

y=ax^2+bx+c

25a+5b+c=-14
9a+3b+c=-6
4a+2b+c=1 getting differences...

16a+2b=-8
5a+b=-7 (10a+2b=-14) differences again...

6a=6, so a=1 making 16a+2b=-8 become:

16+2b=-8, so b=-12 making 4a+2b+c=1 become:

4-24+c=1, so c=21 so our quadratic is:

y=x^2-12x+21