Question

if (2x-3) and (x+5) are multiplied to form the trinomial ax^2 +bx+c, what is the value of b

Answer 1

(x + 5)(2x - 3) =
x(2x - 3) + 5(2x - 3) =
2x^2 - 3x + 10x - 15 =
2x^2 + 7x - 15........so b = 7 <==

Answer 2

b will be -3 + 2*5  = 7