Identify which of the following sets of numbers are the sides of a triangle. Select one or more:
a. 4t, t - 2, and 2+1 when t = 3
b. 8, 13, 21
c. t - 2, 2+1, and 4t, when t = 4
d. 6.2, 7, 9

12

step-by-step explanation:

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).