Sacha places 25 counters into 14 boxes so that each box contains 1, 2 or 3 counters. No box is inside any other box. Seven boxes contain 1 counter. How many contain 3 counters?

∈3,600

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).

step-by-step explanation: