(9 x 10) + (3 x 1) + (7 x 0,1) + (6 x 0,01) =

(93, 95)

Step-by-step explanation:

Simplify the following:

9×10 + 3×1 + (7×0, 1) + (6×0, 1)

0×7 = 0:

9×10 + 3×1 + (0, 1) + (6×0, 1)

0×6 = 0:

9×10 + 3×1 + (0, 1) + (0, 1)

9×10 = 90:

90 + 3×1 + (0, 1) + (0, 1)

3×1 = 3:

90 + 3 + (0, 1) + (0, 1)

90 + 3 + (0, 1) + (0, 1) = (90 + 3 + 0 + 0, 90 + 3 + 1 + 1):

(90 + 3 + 0 + 0, 90 + 3 + 1 + 1)

90 + 3 + 0 + 0 = 90 + 3:

(90 + 3, 90 + 3 + 1 + 1)

90 + 3 = 93:

(93, 90 + 3 + 1 + 1)

| 9 | 0

| | 3

| | 1

+ | | 1

| 9 | 5:

 (93, 95)

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a