The missing numbers are 66 and76.
Step-by-step explanation:

is a root of the quadratic

This quadratic isn't factorable so use the quadratic formula

The plus and minus sign after b means we going to have two roots.
The roots are

and

We subsitue those values for Beta.
27a.

27b.
25
4)row 1. 20 15 10 row 2. 6
Answer:
Area = 10
Step-by-step explanation:
(
×
) ÷ 2 = 10
Answer:
A. 3, 0, -3, -6
Step-by-step explanation:
The sequence with constant first differences is an arithmetic sequence. The sequence of A has a common difference of -3, so is an arithmetic sequence.