Nick is solving the equation 3x2 = 20 – 7x with the quadratic formula.

What values should he use for a, b, and c?

(Points : 1)
a = 3
b = 20
c = –7

a = 3
b = –7
c = 20

a = 3
b = 7
c = –20

a = 3
b = –20
c = 7

Question

Nick is solving the equation 3x2 = 20 – 7x with the quadratic formula.

What values should he use for a, b, and c?

(Points : 1)
       a = 3
            b = 20
            c = –7

       a = 3
            b = –7
            c = 20

       a = 3
            b = 7
            c = –20

       a = 3
            b = –20
            c = 7

welshfella · Answer

write the eqaution in the form
ax^2 + bx + c = 0

3x^2 = 20 - 7x
3x^2 + 7x - 20 = 0

welshfella · Answer

now compare the first equation term by term with the last
eg 
 a = 3

what are b and c?

welshfella · Answer

do you understand what i mean?

welshfella · Answer

are you there?

anonymous · Answer

sorry i was doing something im back

welshfella · Answer

ok do you follow the above ?

anonymous · Answer

no not really honestly i have about 10 to 15 more test to take in algebra today.... i just need the answers on the ones i don't understand....

welshfella · Answer

I cant just give answers i'm afraid
i'll just draw  this to see if  you might get it

|dw:1432226100025:dw|