Find a ∩ b if a = {3, 6, 9, 12} and b = {2, 4, 6, 8, 10, 12}. ø {6, 12} {2, 3, 4, 6, 8, 9, 10, 12}

Find A ∩ B is any numbers that are in both sets

they booth have 6 & 12 so the answer is: {6, 12}

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

cosine

step-by-step explanation: