Identify Coefficients: Identify the coefficients of the trinomial. The trinomial is in the form ax2+bx+c, where a=5, b=19, and c=12.
Find Multiplying Numbers: Find two numbers that multiply to ac (5×12=60) and add up to b (19).We need to find two numbers that multiply to 60 and add up to 19. After checking possible pairs of factors of 60, we find that 4 and 15 satisfy these conditions.4×15=605×12=600
Rewrite Middle Term: Rewrite the middle term 19x using the two numbers found 4 and 15. The trinomial 5x2+19x+12 can be expressed as 5x2+4x+15x+12.
Factor by Grouping: Factor by grouping.Group the terms into two pairs: 5x2+4x and 15x+12.Factor out the greatest common factor from each pair.From the first pair, we can factor out x, resulting in x(5x+4).From the second pair, we can factor out 3, resulting in 3(5x+4).
Write Factored Form: Write the factored form by combining the common factors.Since both groups contain the factor (5x+4), we can combine them to get (x+3)(5x+4) as the factored form of the trinomial.