Question

If

P(x)=(5x+3)^2

Q(x)=ax^2+bx+bc

are equivalent. Find 'ab+c'

answers:

a) 759
b)781
c)769
d)799
e)802

45 points, please.i need that.

Answer 1

Answer:

Step-by-step explanation:

Discriminant of P(x) ;D`=b^2-4ac and that of Q(x) D"=d^2+4acWe are given that ac not equal to 0 .thus ac can either be -ve or + ve.If ac is -ve D` is +ve while D" can be -ve or + veAnd if ac is +ve D" is + ve and D` can be + ve or - ve.For both the cases P(x)Q(x)=0 has at least two real roots

by solving in this method you will get answer 769