Find the missing coefficient.
(4d-4)(3d-2)= 12d^2 + blank d+8

Question

Find the missing coefficient.
(4d-4)(3d-2)= 12d^2 + blank d+8

mckenzieandjesus · Answer

4
	–20
	–4
	20

arivillafana · Answer

LHS	 = (4d-4)(3d-2)
	 = (4d)(3d) + (4d)(-2) + (-4)(3d) + (-4)(-2)
	 = 12d^2 – 8d – 12d +8
	 = 12d^2 – 20d + 8 ------ (1)
But RHS = 12d^2 + _d + 8 ---------(2)
Therefore from (1) and (2),
Missing Coefficient is -20.

jdoe0001 · Answer

hint:   expand and simplify the left-hand-side

calculusxy · Answer

Use the FOIL method.

mckenzieandjesus · Answer

$$\left( 4d-4 \right)\left( 3d-2 \right)=12d^2+[blank]d + 8$$

arivillafana · Answer

I just gave her the answer and everyone is ignoring it lol

jdoe0001 · Answer

yes, so expand and simplify the left-hand-side
it'd end up in a quadratic, and you'd see the middle term :)

calculusxy · Answer

$$(4d-4)(3d-2) = 4d(3d) \times 4d(-2) \times -4(3d) \times -4(-2)$$

calculusxy · Answer

I am pretty sure that this is the foil method right?

calculusxy · Answer

|dw:1444262337064:dw|

mckenzieandjesus · Answer

what do u mean by expand?

mckenzieandjesus · Answer

oh okay

mckenzieandjesus · Answer

Thank you guys!

calculusxy · Answer

Did you get your answer?

mckenzieandjesus · Answer

Yes well @arivillafana  gave it to me

mckenzieandjesus · Answer

Could u help me with this question? 

 	Match the expression with its name.
3x3 – 3x + 3
 	
	quadratic binomial
	cubic trinomial
	fourth-degree monomial
	not a polynomial

arivillafana · Answer

cubic

mckenzieandjesus · Answer

Are u sure?

mckenzieandjesus · Answer

I have a great grade right now & just dont wanna loose it haha

arivillafana · Answer

that's what i think the expression has 3 terms
a leading term with a power of 3 is a cubic

mckenzieandjesus · Answer

Oh okay ur right

mckenzieandjesus · Answer

@calculusxy when i calculated that i came up with 132?