In the game, your score grew by 200 points each time you scored. Two expressions below
represent your score after 12 hits. Find both.

200 + 200 + + 200 + 200
12times

200 200... 200 200
12times

200 12

200 + 12

the correct answer is 5 6 and 7

mujhko hui na

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81