Factor the quadratic expression 3x^2 + 4x - 4*

(x+2)(3x-2)

Step-by-step explanation:

3x^2 +4x-4

AC method

_×_= ac=-12

_+_=b = 4

6 and -2

But because a is multiplied by 3 you need to divide both by 3 so 6/3 is 2 and because you can not divide -2 by three you move the 3 back to the x and leave it as (3x-2)

it has 4

step-by-step explanation:

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the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12