Question

METAL&FAN. ;)
What is the value of the coefficient "b" when the quadratic equation y = (2x + 1)(4x − 3) is written in standard form?

−2
−3
5
10

Answer 1

first thing you want to do is multiply it out

Answer 2

y=8x^2-2x-3

Answer 3

so b=-2

Answer 4

The standard form is ax² + bx + c

Expend the expression (2x+1)(4x-3) ( Foil )
= 8x² -6x +4x -3 = 8x² -2x -3

b = -3 == i got this. What did i do wrong?

Answer 5

@mirrorimagemirage

Answer 6

if the standard form is ax^2+bx+c, then look for the b in your new equation. hint: b is in front of x

Answer 7

-3 would be the c value

Answer 8

Oooh thankyou(:

Answer 9

yeah no problem!