Question

PLZ HELP ASAP 30 POINTS (Plz show work)

Choose a trinomial to factor.
3x2 − 15x + 18
10a2 + 5a − 30
4n2 − 10n − 24

Answer 1

x=6 x=-1

a=1.5 a=-2

n=-1.5 n=4

Explanation:

(a) (b) (c)

10a2+5a-30

x=-b+-√b2-4ac/2a

a=-5+-√(5)2-4(10)(-30)/2(10)

a=-5+-√25+1200/20

a=-5+-√1225/20

a=-5+√1225/20

a=1.5

a=-5-√1225/20

a=-2

Answer 2

3x2-15x+18
=x-3+6

10a2+5a-30
2a-6

4n2 -10n-24
=2n-5-12