Which expression is equivalent to 2(3x+4)(x−1)(x−3)? A
6x3−16x2−14x+24

B
6x3−4x2−34x−24

C
3x3−8x2−7x+12

D
6x3+20x2−2x−24

A

Step-by-step explanation:

=(2(3x+4)(x−1))(x+−3)

=(2(3x+4)(x−1))(x)+(2(3x+4)(x−1))(−3)

=6x3+2x2−8x−18x2−6x+24

=6x3−16x2−14x+24

-2 is the right

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: