Question

When the quadratic equation y = (x − 3)(2x + 7) is written in standard form, what is the value of the coefficient "b"?

Answer 1

standard form,i sy=ax^2+bx+c
y=2x^2-6x+7x-21
y=2x^2+x-21
b=1

Answer 2

First, you must simplify \((x - 3)(2x + 7)\)

\( \color{Black}{\Rightarrow x(2x + 7) - 3(2x + 7) }\)

\( \color{Black}{\Rightarrow 2x^2 + 7x - 6x - 21}\)

\( \color{Black}{\Rightarrow 2x^2 + x - 21}\)

Answer 3

\(b\) is the coefficient of \(x\).

Answer 4

What do you find the coefficient of \(x\) to be?

Answer 5

1 Thanks guys

Answer 6

Glad to help you!

Answer 7

I might have more I need help on.