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Factoring perfect trinomials we can remember the formulas listed below.

(a+b)

(a-b)

Solution:

Given equation is x

Here we can use this formula a

Compare the trinomial equation with the formula to determine the factors

First term is a

Last term is b

Put the plus symbol in between them with second power exponent.

Answer is (x+5)

Solution:

Given equation is 4x

Here we can use this formula a

Compare the trinomial equation with the formula to determine the factors

First term is a

Last term is b

Put the minus symbol in between them with second power exponent.

Answer is (2x-6)