Find a u b. a){3,7}b){3,5,6,7}c){2,3,5,7,8,9,12 }d){3,5,6,7,8,11,12}

{3,5,6,7}

Step-by-step explanation:

We need only to pick numbers from 2 sums, A and B, together

{3,5,6,7,8,11,12}.

Step-by-step explanation:

 To find the union of two sets, combine the elements of both sets.

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1