Question

Write the quadratic equation in standard form and then choose the value of "b."

(2x - 1)(x + 6) = 0

1. -4
2. 11
3. 12

Answer 1

`\left(2x-1\right)\left(x+6\right) = 2x\left(x\right)+2x\left(6\right)-1\left(x\right)-1\left(6\right) = 2x^2+12x-x-6 =2x^2+11x-6 b=11`

Answer 2

Converting to standard form by FOIL method:

(2x - 1)(x + 6)
2x^2 + 12x - x - 6
2x^2 + 11x - 6

Standard form operates in the form:

ax^2 + bx + c

b = 11